C20 spoilers...
Regular set...
Migratory Greathorn
3G
Creature - Beast
Mutate 2G
Whenever this creature mutates, search your library for a basic land card, and put it into the battlefield tapped, then shuffle your library.
Illus. Filip Burburan 3/4
Ominous Seas
1U
Enchantment
Whenever you draw a card, put an
omen counter on Ominous Seas.
Remove 8
omen counters: Create an 8/8 blue Kraken creature token.
Cycling 2
Rooting Moloch
4R
Creature - Lizard
When Rooting Moloch enters the battlefield,
exile target card with a cycling ability from your graveyard. Until the end of your next turn, you may play that card.
Cycling 2: (2, Discard this card: Draw a card.)