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

Taigam, Master Opportunist

Clockspinning

Karn's Temporal Sundering

How it works

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