Taigam, Master Opportunist + Clockspinning + Karn's Temporal Sundering

Prerequisites

• You control at least one legendary creature and/or planeswalker.
• You've cast exactly one spell this turn.

Steps

1. 1Cast Karn's Temporal Sundering by paying its mana cost.
2. 2Taigam triggers, copying Karn's Temporal Sundering and exiling the original Karn's Temporal Sundering with four time counters on it.
3. 3Resolve the Karn's Temporal Sundering copy, causing you to take an extra turn after this one.
4. 4Cast Clockspinning with buyback by paying , removing a time counter from Karn's Temporal Sundering and returning Clockspinning to your hand.
5. 5Repeat step 4 one additional time.
6. 6Move to your next turn. At the beginning of your upkeep, Karn's Temporal Sundering's suspend ability triggers, removing a time counter from it.
7. 7Cast Clockspinning with buyback by paying , removing a time counter from Karn's Temporal Sundering and returning Clockspinning to your hand.
8. 8Karn's Temporal Sundering's suspend ability triggers, causing you to cast it from exile without paying its mana cost.
9. 9Repeat from step 2.

Effects

• Infinite turns
• Lock