Thryx, the Sudden Storm [PTHB]

Thryx, the Sudden Storm

Legendary Creature — Elemental Giant

Flash (You may cast this spell any time you could cast an instant.)FlyingSpells you cast with mana value 5 or greater cost less to cast and can't be countered.

4/5

Even in their mountain fortresses, the Akroans have learned not to anger Thassa.