Tetsuo, Imperial Champion

Whenever Tetsuo, Imperial Champion attacks,
if it's equipped, choose one —
•Tetsuo deals damage equal to the highest
mana value among Equipment attached to it
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 Tetsuo without paying its
mana cost.