Emperor of The Sea, Kaido

Magecraft — Whenever you cast or copy an
instant or sorcery spell, scry 1. If that spell's
mana value is 5 or greater, create a 4/4
blue and red Elemental creature token.
If that spell's mana value is 10 or greater, Emperor of The Sea, Kaido deals 10 damage
to an opponent chosen at random.