At the beginning of your upkeep, put a muster counter on Assemble the Legion. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on Assemble the Legion.
{5}{R}{G}
Atarka, World Render
Legendary Creature - Dragon
Flying, trample
Whenever a Dragon you control attacks, it gains double strike until end of turn.
6 /
4
{2}{R}{R}{W}{W}
Aurelia, the Warleader
Legendary Creature - Angel
Flying, vigilance, haste
Whenever Aurelia, the Warleader attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase.
3 /
4
{2}{R/W}{R/W}{R/W}
Balefire Liege
Creature - Spirit Horror
Other red creatures you control get +1/+1.
Other white creatures you control get +1/+1.
Whenever you cast a red spell, Balefire Liege deals 3 damage to target player or planeswalker.
Whenever you cast a white spell, you gain 3 life.
2 /
4
{3}{R}{W}
Basandra, Battle Seraph
Legendary Creature - Angel
Flying
Players can't cast spells during combat.
{R}: Target creature attacks this turn if able.
4 /
4
--
Battlefield Forge
Land
{T}: Add {C}.
{T}: Add {R} or {W}. Battlefield Forge deals 1 damage to you.
{3}{R}{R}
Berserkers' Onslaught
Enchantment
Attacking creatures you control have double strike.
--
Blighted Woodland
Land
{T}: Add {C}.
{3}{G}, {T}, Sacrifice Blighted Woodland: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
--
Blossoming Sands
Land
Blossoming Sands enters the battlefield tapped.
When Blossoming Sands enters the battlefield, you gain 1 life.
{T}: Add {G} or {W}.
{R}{W}
Boros Charm
Instant
Choose one --
• Boros Charm deals 4 damage to target player or planeswalker.
• Permanents you control gain indestructible until end of turn.
• Target creature gains double strike until end of turn.
--
Boros Garrison
Land
Boros Garrison enters the battlefield tapped.
When Boros Garrison enters the battlefield, return a land you control to its owner's hand.
{T}: Add {R}{W}.
--
Boros Guildgate
Land - Gate
Boros Guildgate enters the battlefield tapped.
{T}: Add {R} or {W}.
{2}
Boros Signet
Artifact
{1}, {T}: Add {R}{W}.
{5}{W}{W}
Bruna, the Fading Light
Legendary Creature - Angel Horror
When you cast this spell, you may return target Angel or Human creature card from your graveyard to the battlefield.
Flying, vigilance
(Melds with Gisela, the Broken Blade.)
5 /
7
--
Cascading Cataracts
Land
Indestructible
{T}: Add {C}.
{5}, {T}: Add five mana in any combination of colors.
{5}{R}{R}
Chaos Maw
Creature - Hellion
When Chaos Maw enters the battlefield, it deals 3 damage to each other creature.
6 /
6
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{3}
Commander's Sphere
Artifact
{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.
{G}{G}{W}
Congregation at Dawn
Instant
Search your library for up to three creature cards, reveal them, then shuffle and put those cards on top in any order.
{1}{R}{G}
Domri Rade
Legendary Planeswalker - Domri
+1: Look at the top card of your library. If it's a creature card, you may reveal it and put it into your hand.
-2: Target creature you control fights another target creature.
-7: You get an emblem with "Creatures you control have double strike, trample, hexproof, and haste."
L:
3
{2}{R}{R}{G}{G}
Dragonlair Spider
Creature - Spider
Reach
Whenever an opponent casts a spell, create a 1/1 green Insect creature token.
5 /
6
{3}{G}{W}
Dromoka, the Eternal
Legendary Creature - Dragon
Flying
Whenever a Dragon you control attacks, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)
5 /
5
{2}{W}{W}
Emeria Angel
Creature - Angel
Flying
Landfall -- Whenever a land enters the battlefield under your control, you may create a 1/1 white Bird creature token with flying.
3 /
3
--
Evolving Wilds
Land
{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{3}{G}
Frontier Siege
Enchantment
As Frontier Siege enters the battlefield, choose Khans or Dragons.
• Khans -- At the beginning of each of your main phases, add {G}{G}.
• Dragons -- Whenever a creature with flying enters the battlefield under your control, you may have it fight target creature you don't control.
{2}{W}
Frontline Medic
Creature - Human Cleric
Battalion -- Whenever Frontline Medic and at least two other creatures attack, creatures you control gain indestructible until end of turn.
Sacrifice Frontline Medic: Counter target spell with {X} in its mana cost unless its controller pays {3}.
3 /
3
{2}{W}{W}
Gisela, the Broken Blade
Legendary Creature - Angel Horror
Flying, first strike, lifelink
At the beginning of your end step, if you both own and control Gisela, the Broken Blade and a creature named Bruna, the Fading Light, exile them, then meld them into Brisela, Voice of Nightmares.
4 /
3
{R}{G}
Gruul Charm
Instant
Choose one --
• Creatures without flying can't block this turn.
• Gain control of all permanents you own.
• Gruul Charm deals 3 damage to each creature with flying.
--
Gruul Guildgate
Land - Gate
Gruul Guildgate enters the battlefield tapped.
{T}: Add {R} or {G}.
{5}{R}{G}
Gruul Ragebeast
Creature - Beast
Whenever Gruul Ragebeast or another creature enters the battlefield under your control, that creature fights target creature an opponent controls.
6 /
6
{2}
Gruul Signet
Artifact
{1}, {T}: Add {R}{G}.
--
Gruul Turf
Land
Gruul Turf enters the battlefield tapped.
When Gruul Turf enters the battlefield, return a land you control to its owner's hand.
{T}: Add {R}{G}.
{2}{R}{G}
Gruul War Chant
Enchantment
Attacking creatures you control get +1/+0 and have menace.
{2}{G}{G}
Harmonize
Sorcery
Draw three cards.
--
Haunted Fengraf
Land
{T}: Add {C}.
{3}, {T}, Sacrifice Haunted Fengraf: Return a creature card at random from your graveyard to your hand.
{3}
Hazoret's Monument
Legendary Artifact
Red creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, you may discard a card. If you do, draw a card.
{3}{W}
Heliod, God of the Sun
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to white is less than five, Heliod isn't a creature. (Each {W} in the mana costs of permanents you control counts toward your devotion to white.)
Other creatures you control have vigilance.
{2}{W}{W}: Create a 2/1 white Cleric enchantment creature token.
5 /
6
{2}{R}{W}
Iroas, God of Victory
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to red and white is less than seven, Iroas isn't a creature.
Creatures you control have menace.
Prevent all damage that would be dealt to attacking creatures you control.
7 /
4
{3}{G}{G}{G}
Jugan, the Rising Star
Legendary Creature - Dragon Spirit
Flying
When Jugan, the Rising Star dies, you may distribute five +1/+1 counters among any number of target creatures.
5 /
5
--
Jungle Shrine
Land
Jungle Shrine enters the battlefield tapped.
{T}: Add {R}, {G}, or {W}.
{1}{R}{G}
Khenra Charioteer
Creature - Jackal Warrior
Trample
Other creatures you control have trample.
3 /
3
--
Kher Keep
Legendary Land
{T}: Add {C}.
{1}{R}, {T}: Create a 0/1 red Kobold creature token named Kobolds of Kher Keep.
{R}{W}
Legion's Initiative
Enchantment
Red creatures you control get +1/+0.
White creatures you control get +0/+1.
{R}{W}, Exile Legion's Initiative: Exile all creatures you control. At the beginning of the next combat, return those cards to the battlefield under their owner's control and those creatures gain haste until end of turn.
{4}{W}
March of Souls
Sorcery
Destroy all creatures. They can't be regenerated. For each creature destroyed this way, its controller creates a 1/1 white Spirit creature token with flying.
{2}{R}{G}
Mina and Denn, Wildborn
Legendary Creature - Elf Ally
You may play an additional land on each of your turns.
{R}{G}, Return a land you control to its owner's hand: Target creature gains trample until end of turn.
4 /
4
{2}
Mind Stone
Artifact
{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.
{1}{R}
Mizzium Mortars
Sorcery
Mizzium Mortars deals 4 damage to target creature you don't control.
Overload {3}{R}{R}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{R}{G}{W}
Naya Charm
Instant
Choose one --
• Naya Charm deals 3 damage to target creature.
• Return target card from a graveyard to its owner's hand.
• Tap all creatures target player controls.
{R/W}{R/W}{R/W}{R/W}{R/W}
Nobilis of War
Creature - Spirit Avatar
Flying
Attacking creatures you control get +2/+0.
3 /
4
{3}{G}{G}{W}{W}
Novablast Wurm
Creature - Wurm
Whenever Novablast Wurm attacks, destroy all other creatures.
7 /
7
{2}{W}{W}
Odric, Master Tactician
Legendary Creature - Human Soldier
First strike (This creature deals combat damage before creatures without first strike.)
Whenever Odric, Master Tactician and at least three other creatures attack, you choose which creatures block this combat and how those creatures block.
3 /
4
{3}{W}
Oketra the True
Legendary Creature - God
Double strike, indestructible
Oketra the True can't attack or block unless you control at least three other creatures.
{3}{W}: Create a 1/1 white Warrior creature token with vigilance.
3 /
6
{3}
Oketra's Monument
Legendary Artifact
White creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{1}{R}{G}{ // }{1}{G}{W}
Pure // Simple
Sorcery // Sorcery
Destroy target multicolored permanent.
Destroy all Auras and Equipment.
{R}{G}{W}
Radiant Kavu
Creature - Kavu
{R}{G}{W}: Prevent all combat damage blue creatures and black creatures would deal this turn.
3 /
3
{1}{G}
Revive
Sorcery
Return target green card from your graveyard to your hand.
{3}
Rhonas's Monument
Legendary Artifact
Green creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, target creature you control gets +2/+2 and gains trample until end of turn.
{3}{R}{G}{W}
Rith, the Awakener
Legendary Creature - Dragon
Flying
Whenever Rith, the Awakener deals combat damage to a player, you may pay {2}{G}. If you do, choose a color, then create a 1/1 green Saproling creature token for each permanent of that color.
6 /
6
--
Rugged Highlands
Land
Rugged Highlands enters the battlefield tapped.
When Rugged Highlands enters the battlefield, you gain 1 life.
{T}: Add {R} or {G}.
{4}{R}{G}
Ruric Thar, the Unbowed
Legendary Creature - Ogre Warrior
Vigilance, reach
Ruric Thar, the Unbowed attacks each combat if able.
Whenever a player casts a noncreature spell, Ruric Thar deals 6 damage to that player.
6 /
6
{5}{R}
Ryusei, the Falling Star
Legendary Creature - Dragon Spirit
Flying
When Ryusei, the Falling Star dies, it deals 5 damage to each creature without flying.
5 /
5
{3}{R}{G}
Samut, Voice of Dissent
Legendary Creature - Human Warrior
Flash
Double strike, vigilance, haste
Other creatures you control have haste.
{W}, {T}: Untap another target creature.
3 /
4
{4}{R}{G}
Savage Ventmaw
Creature - Dragon
Flying
Whenever Savage Ventmaw attacks, add {R}{R}{R}{G}{G}{G}. Until end of turn, you don't lose this mana as steps and phases end.
4 /
4
--
Scattered Groves
Land - Forest Plains
({T}: Add {G} or {W}.)
Scattered Groves enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)
{G}{W}
Selesnya Charm
Instant
Choose one --
• Target creature gets +2/+2 and gains trample until end of turn.
• Exile target creature with power 5 or greater.
• Create a 2/2 white Knight creature token with vigilance.
--
Selesnya Guildgate
Land - Gate
Selesnya Guildgate enters the battlefield tapped.
{T}: Add {G} or {W}.
{G/W}{G/W}
Selesnya Guildmage
Creature - Elf Wizard
{3}{G}: Create a 1/1 green Saproling creature token.
{3}{W}: Creatures you control get +1/+1 until end of turn.
2 /
2
--
Selesnya Sanctuary
Land
Selesnya Sanctuary enters the battlefield tapped.
When Selesnya Sanctuary enters the battlefield, return a land you control to its owner's hand.
{T}: Add {G}{W}.
{2}
Selesnya Signet
Artifact
{1}, {T}: Add {G}{W}.
--
Shinka, the Bloodsoaked Keep
Legendary Land
{T}: Add {R}.
{R}, {T}: Target legendary creature gains first strike until end of turn.
{3}{G}{W}
Sigarda, Heron's Grace
Legendary Creature - Angel
Flying
You and Humans you control have hexproof.
{2}, Exile a card from your graveyard: Create a 1/1 white Human Soldier creature token.
4 /
5
{R}{G}
Signal the Clans
Instant
Search your library for three creature cards and reveal them. If you reveal three cards with different names, choose one of them at random and put that card into your hand. Shuffle the rest into your library.
{R}{G}
Skarrg Guildmage
Creature - Human Shaman
{R}{G}: Creatures you control gain trample until end of turn.
{1}{R}{G}: Target land you control becomes a 4/4 Elemental creature until end of turn. It's still a land.
2 /
2
{1}
Skullclamp
Artifact - Equipment
Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip {1}
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{6}
Soul of New Phyrexia
Artifact Creature - Phyrexian Avatar
Trample
{5}: Permanents you control gain indestructible until end of turn.
{5}, Exile Soul of New Phyrexia from your graveyard: Permanents you control gain indestructible until end of turn.
6 /
6
{1}{R}{G}{G}
Spellbreaker Behemoth
Creature - Beast
This spell can't be countered.
Creature spells you control with power 5 or greater can't be countered.
5 /
5
{R}{W}
Sunhome Guildmage
Creature - Human Wizard
{1}{R}{W}: Creatures you control get +1/+0 until end of turn.
{2}{R}{W}: Create a 1/1 red and white Soldier creature token with haste.
2 /
2
--
Temple of Abandon
Land
Temple of Abandon enters the battlefield tapped.
When Temple of Abandon enters the battlefield, scry 1.
{T}: Add {R} or {G}.
--
Terminal Moraine
Land
{T}: Add {C}.
{2}, {T}, Sacrifice Terminal Moraine: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
--
Terramorphic Expanse
Land
{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{1}{G}
Thornscape Familiar
Creature - Insect
Red spells and white spells you cast cost {1} less to cast.
2 /
1
{R}
Vandalblast
Sorcery
Destroy target artifact you don't control.
Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
--
Vivid Crag
Land
Vivid Crag enters the battlefield tapped with two charge counters on it.
{T}: Add {R}.
{T}, Remove a charge counter from Vivid Crag: Add one mana of any color.
--
Vivid Grove
Land
Vivid Grove enters the battlefield tapped with two charge counters on it.
{T}: Add {G}.
{T}, Remove a charge counter from Vivid Grove: Add one mana of any color.
--
Vivid Meadow
Land
Vivid Meadow enters the battlefield tapped with two charge counters on it.
{T}: Add {W}.
{T}, Remove a charge counter from Vivid Meadow: Add one mana of any color.
--
Wind-Scarred Crag
Land
Wind-Scarred Crag enters the battlefield tapped.
When Wind-Scarred Crag enters the battlefield, you gain 1 life.
{T}: Add {R} or {W}.
{4}{W}{W}
Yosei, the Morning Star
Legendary Creature - Dragon Spirit
Flying
When Yosei, the Morning Star dies, target player skips their next untap step. Tap up to five target permanents that player controls.