The Peony Samurai

Whenever The Peony Samurai attacks, if it's equipped, choose one -
• The Peony Samurai 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 The Peony Samurai without paying
its mana cost.