Taigam, Master Opportunist + Clockspinning + Expropriate

Prerequisites

You've cast exactly one spell this turn.

Steps

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