As Adaptive Automaton enters the battlefield, choose a creature type.

Adaptive Automaton is the chosen type in addition to its other types.

Other creatures you control of the chosen type get +1/+1.

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.

Whenever one or more modified creatures you control attack, untap all modified creatures you control. After this combat phase, there is an additional combat phase. This ability triggers only once each turn. (Equipment, Auras you control, and counters are modifications.)

When Balduvian Horde enters the battlefield, sacrifice it unless you discard a card at random.

{T}: Remove target blocking creature from combat. Creatures it was blocking that hadn't become blocked by another creature this combat become unblocked, then it blocks an attacking creature of your choice. Activate only during the declare blockers step.

Other Barbarian creatures get +1/+1.

{R}: Another target Barbarian creature gets +1/+0 until end of turn.

(Gain the next level as a sorcery to add its ability.)

If you would roll one or more dice, instead roll that many dice plus one and ignore the lowest roll.

{1}{R}: Level 2

Whenever you roll one or more dice, target creature you control gets +2/+0 and gains menace until end of turn.

{2}{R}: Level 3

Creatures you control have haste.

When you control no Swamps, sacrifice Barbarian Outcast.

Destroy target artifact, creature, or planeswalker.

{4}, {T}: Create a 2/2 colorless Shapeshifter creature token with changeling. (It has every creature type.)

Changeling (This card is every creature type.)

Up to two target creatures each get +2/+0 and gain all creature types until end of turn.

Changeling (This card is every creature type.)

As Bloodline Pretender enters the battlefield, choose a creature type.

Whenever another creature of the chosen type enters the battlefield under your control, put a +1/+1 counter on Bloodline Pretender.

Flying, trample

Whenever Bloodthirster deals combat damage to a player, untap it. After this combat phase, there is an additional combat phase.

Bloodthirster can't attack a player it has already attacked this turn.

Changeling (This card is every creature type.)

As long as a creature card with flying is in a graveyard, Cairn Wanderer has flying. The same is true for fear, first strike, double strike, deathtouch, haste, landwalk, lifelink, protection, reach, trample, shroud, and vigilance.

Trample

When Caves of Chaos Adventurer enters the battlefield, you take the initiative.

Whenever Caves of Chaos Adventurer attacks, exile the top card of your library. If you've completed a dungeon, you may play that card this turn without paying its mana cost. Otherwise, you may play that card this turn.

Changeling (This card is every creature type.)

Haste

Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

Changeling (This card is every creature type.)

Changeling Outcast can't block and can't be blocked.

If Combat Celebrant hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase. (An exerted creature won't untap during your next untap step.)

As Conspiracy enters the battlefield, choose a creature type.

Creatures you control are the chosen type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

As Cover of Darkness enters the battlefield, choose a creature type.

Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and/or black creatures.)

Choose a creature type. Creatures that aren't of the chosen type get -3/-3 until end of turn.

Changeling (This card is every creature type.)

{R}: Fire-Belly Changeling gets +1/+0 until end of turn. Activate no more than twice each turn.

You may exile two red cards from your hand rather than pay this spell's mana cost.

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.

When Godo, Bandit Warlord enters the battlefield, you may search your library for an Equipment card, put it onto the battlefield, then shuffle.

Whenever Godo attacks for the first time each turn, untap it and all Samurai you control. After this phase, there is an additional combat phase.

Changeling (This card is every creature type.)

When Graveshifter enters the battlefield, you may return target creature card from your graveyard to your hand.

First strike

Commander creatures you own have "Whenever this creature becomes tapped, it and other creatures you control that share a creature type with it each get +2/+0 and gain undying until end of turn." (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

As Herald's Horn enters the battlefield, choose a creature type.

Creature spells you cast of the chosen type cost {1} less to cast.

At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.

Pack tactics -- Whenever Hobgoblin Captain attacks, if you attacked with creatures with total power 6 or greater this combat, Hobgoblin Captain gains first strike until end of turn.

First strike, haste

{T}: Jeska, Warrior Adept deals 1 damage to any target.

Haste (This creature can attack and {T} as soon as it comes under your control.)

{T}: Kamahl, Pit Fighter deals 3 damage to any target.

Whenever you attack, if it's the first combat phase of the turn, untap all attacking creatures. They gain first strike until end of turn. After this phase, there is an additional combat phase.

Choose a Background (You can have a Background as a second commander.)

Haste

Echo {2}{R}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

When Keldon Champion enters the battlefield, it deals 3 damage to target player or planeswalker.

Choose a creature type. For each creature you control of the chosen type, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step.

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

{3}, {T}: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

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.

As Molten Echoes enters the battlefield, choose a creature type.

Whenever a nontoken creature of the chosen type enters the battlefield under your control, create a token that's a copy of that creature. That token gains haste. Exile it at the beginning of the next end step.

Each creature you control gets +1/+0 for each time it has attacked this turn.

Landfall -- Whenever a land enters the battlefield under your control, if it's your main phase, there's an additional combat phase after this phase. At the beginning of that combat, untap all creatures you control.

Choose a creature type. Target creature gets -1/-1 until end of turn for each permanent of the chosen type you control.

Threshold -- As long as seven or more cards are in your graveyard, Pardic Arsonist has "When Pardic Arsonist enters the battlefield, it deals 3 damage to any target."

First strike

{B}: Pardic Collaborator gets +1/+1 until end of turn.

Each player chooses a creature type. Each player returns all creature cards of a type chosen this way from their graveyard to the battlefield.

As Pillar of Origins enters the battlefield, choose a creature type.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

When Plundering Barbarian enters the battlefield, choose one --

• Smash the Chest -- Destroy target artifact.

• Pry It Open -- Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Whenever Port Razer deals combat damage to a player, untap each creature you control. After this phase, there is an additional combat phase.

Port Razer can't attack a player it has already attacked this turn.

First strike

Threshold -- As long as seven or more cards are in your graveyard, Possessed Barbarian gets +1/+1, is black, and has "{2}{B}, {T}: Destroy target red creature."

Sacrifice Reckless Barbarian: Add {R}{R}.

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.

Cast this spell only during your turn and only during combat.

Choose one --

• Creatures you control gain double strike until end of turn.

• Untap all creatures you control. After this phase, there is an additional combat phase.

Entwine {1}{R} (Choose both if you pay the entwine cost.)

Flying

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.

As Secluded Courtyard 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 or activate an ability of a creature source of the chosen type.

Untap target creature. After this main phase, there is an additional combat phase followed by an additional main phase.

Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Protection from white

Changeling (This card is every creature type.)

{1}{B}: Regenerate Skeletal Changeling.

Changeling (This card is every creature type.)

Whenever an opponent casts a spell, you may put a +1/+1 counter on Taurean Mauler.

Trample

Pack tactics -- Whenever Tiger-Tribe Hunter attacks, if you attacked with creatures with total power 6 or greater this combat, you may sacrifice another creature. When you do, Tiger-Tribe Hunter deals damage equal to the sacrificed creature's power to target creature.

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.

{1}{B}, Discard a card: Return Undead Gladiator from your graveyard to your hand. Activate only during your upkeep.

Cycling {1}{B} ({1}{B}, Discard this card: Draw a card.)

Changeling (This card is every creature type.)

As Vanquisher's Banner enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +1/+1.

Whenever you cast a creature spell of the chosen type, draw a card.

Changeling (This card is every creature type.)

Deathtouch

When Vicious Battlerager enters the battlefield, you take the initiative.

Spiked Retribution -- Whenever Vicious Battlerager becomes blocked by a creature, that creature's controller loses 5 life.

Changeling (This card is every creature type.)

{R}: War-Spike Changeling gains first strike until end of turn.

After the first postcombat main phase this turn, there's an additional combat phase followed by an additional main phase. At the beginning of that combat, untap all creatures that attacked this turn.

Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Trample

Whenever Zalto, Fire Giant Duke is dealt damage, venture into the dungeon. (Enter the first room or advance to the next room.)

+1: Creatures you control get +1/+0 and gain haste until end of turn.

0: Create a 1/1 red Devil creature token with "When this creature dies, it deals 1 damage to any target."

-6: You get an emblem with "At the end of the first combat phase on your turn, untap target creature you control. After this phase, there is an additional combat phase."