Ixalan

Pounce | Instant | | Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.) | Lucas Graciano

River Heralds' Boon | Instant | | Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk. | Alex Konstad

Verdant Rebirth | Instant | | Until end of turn, target creature gains "When this creature dies, return it to its owner's hand." Draw a card. | Josu Hernaiz