Ravnica Allegiance

Applied Biomancy | Instant | | Choose one or both — • Target creature gets +1/+1 until end of turn. • Return target creature to its owner's hand. | Sidharth Chaturvedi

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

Combine Guildmage | Creature | Merfolk Wizard | {1}{G}, {T}: This turn, each creature you control enters the battlefield with an additional +1/+1 counter on it. {1}{U}, {T}: Move a +1/+1 counter from target creature you control onto another target creature you control. | Yeong-Hao Han

Growth Spiral | Instant | | Draw a card. You may put a land card from your hand onto the battlefield. | Seb McKinnon

Hydroid Krasis | Creature | Jellyfish Hydra Beast | When you cast this spell, you gain half X life and draw half X cards. Round down each time. Flying, trample Hydroid Krasis enters the battlefield with X +1/+1 counters on it. | Jason Felix

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

Clan Guildmage | Creature | Human Shaman | {1}{R}, {T}: Target creature can't block this turn. {2}{G}, {T}: Target land you control becomes a 4/4 Elemental creature with haste until end of turn. It's still a land. | Tomasz Jedruszek

Zhur-Taa Goblin | Creature | Goblin Berserker | Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.) | Wayne Reynolds

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