When Acclaimed Contender enters the battlefield, if you control another Knight, look at the top five cards of your library. You may reveal a Knight, Aura, Equipment, or legendary artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
3 /
3
{3}{B}{R}
Angrath, the Flame-Chained
Legendary Planeswalker - Angrath
+1: Each opponent discards a card and loses 2 life.
-3: Gain control of target creature until end of turn. Untap it. It gains haste until end of turn. Sacrifice it at the beginning of the next end step if it has mana value 3 or less.
-8: Each opponent loses life equal to the number of cards in their graveyard.
L:
4
{1}{W}{B}
Anguished Unmaking
Instant
Exile target nonland permanent. You lose 3 life.
{2}{W}{B}
Aryel, Knight of Windgrace
Legendary Creature - Human Knight
Vigilance
{2}{W}, {T}: Create a 2/2 white Knight creature token with vigilance.
{B}, {T}, Tap X untapped Knights you control: Destroy target creature with power X or less.
4 /
4
--
Castle Embereth
Land
Castle Embereth enters the battlefield tapped unless you control a Mountain.
{T}: Add {R}.
{1}{R}{R}, {T}: Creatures you control get +1/+0 until end of turn.
{2}{W}{W}
Citadel Siege
Enchantment
As Citadel Siege enters the battlefield, choose Khans or Dragons.
• Khans -- At the beginning of combat on your turn, put two +1/+1 counters on target creature you control.
• Dragons -- At the beginning of combat on each opponent's turn, tap target creature that player controls.
--
Clifftop Retreat
Land
Clifftop Retreat enters the battlefield tapped unless you control a Mountain or a Plains.
{T}: Add {R} or {W}.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{W}{B}
Corpse Knight
Creature - Zombie Knight
Whenever another creature enters the battlefield under your control, each opponent loses 1 life.
2 /
2
{W}{B}
Dire Tactics
Instant
Exile target creature. If you don't control a Human, you lose life equal to that creature's toughness.
{B}{R}
Dreadbore
Sorcery
Destroy target creature or planeswalker.
{4}{R}{R}
Embercleave
Legendary Artifact - Equipment
Flash
This spell costs {1} less to cast for each attacking creature you control.
When Embercleave enters the battlefield, attach it to target creature you control.
Equipped creature gets +1/+1 and has double strike and trample.
Equip {3}
{3}{R}
Embereth Skyblazer
Creature - Human Knight
As long as it's your turn, Embereth Skyblazer has flying.
Whenever Embereth Skyblazer attacks, you may pay {2}{R}. If you do, creatures you control get +X/+0 until end of turn, where X is the number of opponents you have.
4 /
3
--
Fabled Passage
Land
{T}, Sacrifice Fabled Passage: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.
{3}{B}
Fell Specter
Creature - Specter
Flying
When Fell Specter enters the battlefield, target opponent discards a card.
Whenever an opponent discards a card, that player loses 2 life.
1 /
3
{R}
Fervent Champion
Creature - Human Knight
First strike, haste
Whenever Fervent Champion attacks, another target attacking Knight you control gets +1/+0 until end of turn.
Equip abilities you activate that target Fervent Champion cost {3} less to activate.
1 /
1
{1}{W}{B}
General Kudro of Drannith
Legendary Creature - Human Soldier
Other Humans you control get +1/+1.
Whenever General Kudro of Drannith or another Human enters the battlefield under your control, exile target card from an opponent's graveyard.
{2}, Sacrifice two Humans: Destroy target creature with power 4 or greater.
3 /
3
{2}{W}{W}
Gideon, Ally of Zendikar
Legendary Planeswalker - Gideon
+1: Until end of turn, Gideon, Ally of Zendikar becomes a 5/5 Human Soldier Ally creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn.
0: Create a 2/2 white Knight Ally creature token.
-4: You get an emblem with "Creatures you control get +1/+1."
L:
4
--
Godless Shrine
Land - Plains Swamp
({T}: Add {W} or {B}.)
As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{1}{W}{W}
History of Benalia
Enchantment - Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II -- Create a 2/2 white Knight creature token with vigilance.
III -- Knights you control get +2/+1 until end of turn.
{3}
Icon of Ancestry
Artifact
As Icon of Ancestry enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{3}, {T}: Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
{R}{W}
Inspiring Veteran
Creature - Human Knight
Other Knights you control get +1/+1.
2 /
2
{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
--
Isolated Chapel
Land
Isolated Chapel enters the battlefield tapped unless you control a Plains or a Swamp.
{T}: Add {W} or {B}.
{1}{W}
Knight of Grace
Creature - Human Knight
First strike
Hexproof from black (This creature can't be the target of black spells or abilities your opponents control.)
Knight of Grace gets +1/+0 as long as any player controls a black permanent.
2 /
2
{1}{B}
Knight of Malice
Creature - Human Knight
First strike
Hexproof from white (This creature can't be the target of white spells or abilities your opponents control.)
Knight of Malice gets +1/+0 as long as any player controls a white permanent.
2 /
2
{B}
Knight of the Ebon Legion
Creature - Vampire Knight
{2}{B}: Knight of the Ebon Legion gets +3/+3 and gains deathtouch until end of turn.
At the beginning of your end step, if a player lost 4 or more life this turn, put a +1/+1 counter on Knight of the Ebon Legion. (Damage causes loss of life.)
1 /
2
{1}{W}{B}
Knights' Charge
Enchantment
Whenever a Knight you control attacks, each opponent loses 1 life and you gain 1 life.
{6}{W}{B}, Sacrifice Knights' Charge: Return all Knight creature cards from your graveyard to the battlefield.
{2}{B}{B}
Liliana, Waker of the Dead
Legendary Planeswalker - Liliana
+1: Each player discards a card. Each opponent who can't loses 3 life.
-3: Target creature gets -X/-X until end of turn, where X is the number of cards in your graveyard.
-7: You get an emblem with "At the beginning of combat on your turn, put target creature card from a graveyard onto the battlefield under your control. It gains haste."
L:
4
{3}{W}
Mangara, the Diplomat
Legendary Creature - Human Cleric
Lifelink
Whenever an opponent attacks with creatures, if two or more of those creatures are attacking you and/or planeswalkers you control, draw a card.
Whenever an opponent casts their second spell each turn, draw a card.
2 /
4
{2}
Metallic Mimic
Artifact Creature - Shapeshifter
As Metallic Mimic enters the battlefield, choose a creature type.
Metallic Mimic is the chosen type in addition to its other types.
Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it.
2 /
1
{2}{B}
Midnight Reaper
Creature - Zombie Knight
Whenever a nontoken creature you control dies, Midnight Reaper deals 1 damage to you and you draw a card.
3 /
2
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{1}{B}{B}{ // }{1}{B}{B}
Murderous Rider // Swift End
Creature - Zombie Knight // Instant - Adventure
Lifelink
When Murderous Rider dies, put it on the bottom of its owner's library.
Destroy target creature or planeswalker. You lose 2 life. (Then exile this card. You may cast the creature later from exile.)
2 /
3
{1}{B}{R}
Olivia, Mobilized for War
Legendary Creature - Vampire Knight
Flying
Whenever another creature enters the battlefield under your control, you may discard a card. If you do, put a +1/+1 counter on that creature, it gains haste until end of turn, and it becomes a Vampire in addition to its other types.
3 /
3
{1}{B}{ // }{1}{B}
Order of Midnight // Alter Fate
Creature - Human Knight // Sorcery - Adventure
Flying
Order of Midnight can't block.
Return target creature card from your graveyard to your hand. (Then exile this card. You may cast the creature later from exile.)
2 /
2
--
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}.)
--
Plains
Basic Land - Plains
({T}: Add {W}.)
{X}{W}{W}
Return to the Ranks
Sorcery
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Return X target creature cards with mana value 2 or less from your graveyard to the battlefield.
--
Sacred Foundry
Land - Mountain Plains
({T}: Add {R} or {W}.)
As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
--
Savai Triome
Land - Mountain Plains Swamp
({T}: Add {R}, {W}, or {B}.)
Savai Triome enters the battlefield tapped.
Cycling {3} ({3}, Discard this card: Draw a card.)
{1}
Shadowspear
Legendary Artifact - Equipment
Equipped creature gets +1/+1 and has trample and lifelink.
{1}: Permanents your opponents control lose hexproof and indestructible until end of turn.
Equip {2}
--
Shefet Dunes
Land - Desert
{T}: Add {C}.
{T}, Pay 1 life: Add {W}.
{2}{W}{W}, {T}, Sacrifice a Desert: Creatures you control get +1/+1 until end of turn. Activate only as a sorcery.
{B}
Shrieking Affliction
Enchantment
At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, they lose 3 life.
{1}{B}{ // }{B}
Smitten Swordmaster // Curry Favor
Creature - Human Knight // Sorcery - Adventure
Lifelink
You gain X life and each opponent loses X life, where X is the number of Knights you control.
2 /
1
{B}{R}
Stormfist Crusader
Creature - Human Knight
Menace
At the beginning of your upkeep, each player draws a card and loses 1 life.
2 /
2
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
--
Swamp
Basic Land - Swamp
({T}: Add {B}.)
{2}
Sword of the Animist
Legendary Artifact - Equipment
Equipped creature gets +1/+1.
Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Equip {2}
{3}{R}{W}{B}
Syr Gwyn, Hero of Ashvale
Legendary Creature - Human Knight
Vigilance, menace
Whenever an equipped creature you control attacks, you draw a card and you lose 1 life.
Equipment you control have equip Knight {0}.
5 /
5
{3}{W}{W}
Thalia's Lancers
Creature - Human Knight
First strike
When Thalia's Lancers enters the battlefield, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle.
4 /
4
{4}{W}{W}
The Circle of Loyalty
Legendary Artifact
This spell costs {1} less to cast for each Knight you control.
Creatures you control get +1/+1.
Whenever you cast a legendary spell, create a 2/2 white Knight creature token with vigilance.
{3}{W}, {T}: Create a 2/2 white Knight creature token with vigilance.
--
Tournament Grounds
Land
{T}: Add {C}.
{T}: Add {R}, {W}, or {B}. Spend this mana only to cast a Knight or Equipment spell.
--
Unclaimed Territory
Land
As Unclaimed Territory enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.
{3}{W}
Valiant Knight
Creature - Human Knight
Other Knights you control get +1/+1.
{3}{W}{W}: Knights you control gain double strike until end of turn.
3 /
4
{W}
Venerable Knight
Creature - Human Knight
When Venerable Knight dies, put a +1/+1 counter on target Knight you control.
2 /
1
{B}
Vicious Rumors
Sorcery
Vicious Rumors deals 1 damage to each opponent. Each opponent discards a card, then mills a card. You gain 1 life.
{W}{B}
Wintermoor Commander
Creature - Human Knight
Deathtouch
Wintermoor Commander's toughness is equal to the number of Knights you control.
Whenever Wintermoor Commander attacks, another target Knight you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
2 /
*
{1}{W}
Worthy Knight
Creature - Human Knight
Whenever you cast a Knight spell, create a 1/1 white Human creature token.
2 /
2
{2}{B}
Belle of the Brawl
Creature - Human Knight
Menace (This creature can't be blocked except by two or more creatures.)
Whenever Belle of the Brawl attacks, other Knights you control get +1/+0 until end of turn.
3 /
2
{X}{W/B}{W/B}{W/B}
Immortal Servitude
Sorcery
Return each creature card with mana value X from your graveyard to the battlefield.
{2}{W}
Radiant Destiny
Enchantment
Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
As Radiant Destiny enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1. As long as you have the city's blessing, they also have vigilance.
{5}{W}
Silverwing Squadron
Creature - Human Knight
Flying, vigilance
Silverwing Squadron's power and toughness are each equal to the number of creatures you control.
Whenever Silverwing Squadron attacks, create a number of 2/2 white Knight creature tokens with vigilance equal to the number of opponents you have.
* /
*
{R}{W}
Truefire Paladin
Creature - Human Knight
Vigilance
{R}{W}: Truefire Paladin gets +2/+0 until end of turn.
{R}{W}: Truefire Paladin gains first strike until end of turn.
2 /
2
{2}{W}
Unbreakable Formation
Instant
Creatures you control gain indestructible until end of turn.
Addendum -- If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.