Amastu, Looming Calamity

Flying, prowess (Wherever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast an instant or sorcery spell, Amastu, Looming Calamity deals 1 damage to each opponent, you gain 1 life. If
you cast those spells on your turn they can't
be countered.