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+1/+1 counters
Devoid (This card has no color.) {1}{G}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.) Whenever one or more +1/+1 counters are put on this creature, you may create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add {C}."

First strike Survey the Realm — Whenever Black Panther or another creature you control enters, put a +1/+1 counter on target land you control. Mine Vibranium — {3}: Move all +1/+1 counters from target land you control onto target creature. If one or more +1/+1 counters are moved this way, you gain that much life and draw a card.

Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.) Each other creature you control enters with an additional X +1/+1 counters on it, where X is the number of +1/+1 counters on this creature.

Whenever this creature attacks while saddled, put a +1/+1 counter on target creature. Sacrifice this creature: Creatures you control with counters on them gain hexproof and indestructible until end of turn. Saddle 1 (Tap any number of other creatures you control with total power 1 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Bestow {1}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Landfall — Whenever a land you control enters, put a +1/+1 counter on this permanent. Enchanted creature gets +1/+1 for each +1/+1 counter on this Aura.

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) If this creature was kicked, it enters with two +1/+1 counters on it. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Bestow {3}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Enchanted creature gets +2/+2 and has mentor.

Survival — At the beginning of your second main phase, if this creature is tapped, put a flying, lifelink, or +1/+1 counter on it. Whenever this creature or another creature you control dies, if it had counters on it, put those counters on up to one target creature.

+1/+1 counters
Draw
Whenever a creature you control deals combat damage to a player, choose one — • Goad target creature that player controls. • Exile the top card of that player's library. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.

Draw
Interaction
Interaction
Land
Land
Mana sink
{R}: Creatures you control gain haste until end of turn. {3}{R}{R}: Create a 5/5 red Dragon Spirit creature token with flying. Activate only if you control an attacking modified creature. (Equipment, Auras you control, and counters are modifications.)

Mana sink
Other buffs
Bestow {2}{R} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) This creature attacks each combat if able. Enchanted creature gets +2/+2 and attacks each combat if able.

Other buffs
Ramp
{T}: Add one mana of any color. {2}: Exile target card from a graveyard. You may cast Dinosaur creature spells from among cards you own exiled with this creature. If you cast a spell this way, that creature enters with a finality counter on it. (If a creature with a finality counter on it would die, exile it instead.)

+1: Add X mana in any combination of {R} and/or {G}, where X is the number of creatures you control. 0: Create a 2/2 red and green Satyr creature token with haste. −6: Exile the top seven cards of your library. You may put any number of creature and/or land cards from among them onto the battlefield.

Ramp
Recursion
Whenever another nontoken creature you control enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") Sacrifice three Foods: Return target historic card from your graveyard to your hand. (Artifacts, legendaries, and Sagas are historic.)

Recursion
Shennanigans
You may spend mana as though it were mana of any color to activate abilities of creatures you control. Creatures you control with +1/+1 counters on them have all activated abilities of all creature cards exiled with Agatha's Soul Cauldron. {T}: Exile target card from a graveyard. When a creature card is exiled this way, put a +1/+1 counter on target creature you control.
