Veego, Smoke Snatcher

Whenever an opponent casts an instant or
sorcery spell you may pay life equal to that
card's converted mana cost. If you do, exile it
as it resolves. You may play that card from
exile and spend mana of any color to cast it.
Whenever you cast a spell from exile, if that
spell cost 5 or greater, each opponent gets 2
poison counters.