Invasion of Karsus // Refraction Elemental

Battle — Siege // Creature — Elemental

March of the Machine (MOM) · rare

Oracle Text

[Invasion of Karsus]
(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, it deals 3 damage to each creature and each planeswalker.

[Refraction Elemental]
Ward—Pay 2 life.
Whenever you cast a spell, this creature deals 2 damage to each opponent.