Rivals of Ixalan

Profane Procession | Legendary Enchantment | | {3}{W}{B}: Exile target creature. Then if there are three or more cards exiled with Profane Procession, transform it. | Bastien L. Deharme

Protean Raider | Creature | Shapeshifter Pirate | Raid — If you attacked this turn, you may have Protean Raider enter the battlefield as a copy of any creature on the battlefield. | Izzy

Hadana's Climb | Legendary Enchantment | | At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if that creature has three or more +1/+1 counters on it, transform Hadana's Climb. | Titus Lunter

Journey to Eternity | Legendary Enchantment | Aura | Enchant creature you control When enchanted creature dies, return it to the battlefield under your control, then return Journey to Eternity to the battlefield transformed under your control. | Deruchenko Alexander