Casil, Voice of the Ancestors

Whenever Casil attacks, if he's equipped, choose one —

•Casil deals damage equal to the highest mana value
among Equipment attached to him to any target.

•You may cast an instant or sorcery spell from your hand
with mana value less than or equal to the highest mana
value among Equipment attached to Casil without paying
its mana cost.

“We know what we are, but not what we may be.”