Theros Beyond Death

Nadir Kraken | Creature | Kraken | Whenever you draw a card, you may pay {1}. If you do, put a +1/+1 counter on Nadir Kraken and create a 1/1 blue Tentacle creature token. | Dan Scott

Wavebreak Hippocamp | Enchantment Creature | Horse Fish | Whenever you cast your first spell during each opponent's turn, draw a card. | Caio Monteiro

Dalakos, Crafter of Wonders | Legendary Creature | Merfolk Artificer | {T}: Add {C}{C}. Spend this mana only to cast artifact spells or activate abilities of artifacts. Equipped creatures you control have flying and haste. | Ryan Pancoast