Ixalan

Goring Ceratops | Creature | Dinosaur | Double strike Whenever Goring Ceratops attacks, other creatures you control gain double strike until end of turn. | Zezhou Chen

Fleet Swallower | Creature | Fish | Whenever Fleet Swallower attacks, target player mills half their library, rounded up. | Tomasz Jedruszek

Angrath's Marauders | Creature | Human Pirate | If a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead. | Victor Adame Minguez

Verdant Sun's Avatar | Creature | Dinosaur Avatar | Whenever Verdant Sun's Avatar or another creature enters the battlefield under your control, you gain life equal to that creature's toughness. | Izzy