Arcane Bombardment, Time Warp, and Clockspinning

Prerequisites

• Arcane Bombardment on the battlefield
• Time Warp in exile
• Clockspinning in hand
• each turn available

Steps

1. Cast Clockspinning with buyback by paying
2. Arcane Bombardment triggers, exiling an instant or sorcery at random from your graveyard, and casting a copy of Time Warp without paying its mana cost
3. Resolve Time Warp, causing you to take an extra turn after this one
4. Resolve Clockspinning, returning Clockspinning to your hand
5. Repeat each turn

Results

• Infinite turns