Orb of Arcane Infusion

Spells cast from exile can't be countered by spells or abilities.
Whenever a spell is put on the stack, if there are three or more spells on the stack, return all cards exiled by Orb of Arcane Infusion to your hand.
{4}, Exile an instant or sorcery card from your
hand: The next instant or sorcery spell you cast this turn gains "This spell can't be countered by spells or abilities," and cascade.