Izzet Creativity 🔴🔵 vs Simic Mill 🔵🟢 | Pioneer 12-06-24 | Round 3

Rules question: Doesn't the Mill player get to activate Jace before the impulse can be cast? kzbin.info/www/bejne/qYCTdYifhaesfaM

[@LibertyMTG]

He's casting the Fiery Impulse before it resolves, so it never enters the battlefield. Hullbreaker Horror allows him to return a spell [on the stack] to its owners hand.