Ravnica Allegiance

Growth-Chamber Guardian | Creature | Elf Crab Warrior | {2}{G}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.) Whenever one or more +1/+1 counters are put on Growth-Chamber Guardian, you may search your library for a card named Growth-Chamber Guardian, reveal it, put it into your hand, then shuffle. | Bram Sels

Incubation Druid | Creature | Elf Druid | {T}: Add one mana of any type that a land you control could produce. If Incubation Druid has a +1/+1 counter on it, add three mana of that type instead. {3}{G}{G}: Adapt 3. (If this creature has no +1/+1 counters on it, put three +1/+1 counters on it.) | Daniel Ljunggren

Biomancer's Familiar | Creature | Mutant | Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana. {T}: The next time target creature adapts this turn, it adapts as though it had no +1/+1 counters on it. | Izzy

Simic Ascendancy | Enchantment | | {1}{G}{U}: Put a +1/+1 counter on target creature you control. Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on Simic Ascendancy. At the beginning of your upkeep, if Simic Ascendancy has twenty or more growth counters on it, you win the game. | Izzy

Repudiate | Instant | | Counter target activated or triggered ability. (Mana abilities can't be targeted.) | Victor Adame Minguez

Cindervines | Enchantment | | Whenever an opponent casts a noncreature spell, Cindervines deals 1 damage to that player. {1}, Sacrifice Cindervines: Destroy target artifact or enchantment. Cindervines deals 2 damage to that permanent's controller. | Mark Behm

Thrash | Instant | | Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. | Winona Nelson