Caetus, Sea Tyrant of Segovia

Legendary Creature — Serpent

Noncreature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a noncreature spell pays for 1 or one mana of that creature's color.)
At the beginning of your end step, untap up to four target creatures.

3/3

March of the Machine

Rare