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

Path of Mettle | Legendary Enchantment | | When Path of Mettle enters the battlefield, it deals 1 damage to each creature that doesn't have first strike, double strike, vigilance, or haste. Whenever you attack with at least two creatures that have first strike, double strike, vigilance, and/or haste, transform Path of Mettle. | Victor Adame Minguez

Siegehorn Ceratops | Creature | Dinosaur | Enrage — Whenever Siegehorn Ceratops is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.) | Filip Burburan