Ixalan

Arcane Adaptation | Enchantment | | As Arcane Adaptation enters the battlefield, choose a creature type. Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield. | Mark Behm

Deeproot Waters | Enchantment | | Whenever you cast a Merfolk spell, create a 1/1 blue Merfolk creature token with hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.) | Zezhou Chen

Navigator's Ruin | Enchantment | | Raid — At the beginning of your end step, if you attacked this turn, target opponent mills four cards. | Zoltan Boros

Growing Rites of Itlimoc | Legendary Enchantment | | When Growing Rites of Itlimoc enters the battlefield, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order. At the beginning of your end step, if you control four or more creatures, transform Growing Rites of Itlimoc. | Grzegorz Rutkowski

New Horizons | Enchantment | Aura | Enchant land When New Horizons enters the battlefield, put a +1/+1 counter on target creature you control. Enchanted land has "{T}: Add two mana of any one color." | Noah Bradley