Taigam, Master Opportunist + Clockspinning + Beacon of Tomorrows

Prerequisites

• You've cast exactly one spell this turn.

Steps

1. 1Cast Beacon of Tomorrows by paying its mana cost.
2. 2Taigam triggers, copying Beacon of Tomorrows and exiling the original Beacon of Tomorrows with four time counters on it.
3. 3Resolve the Beacon of Tomorrows copy, causing you to take an extra turn after this one.
4. 4Cast Clockspinning with buyback by paying , removing a time counter from Beacon of Tomorrows 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, Beacon of Tomorrows's suspend ability triggers, removing a time counter from it.
7. 7Cast Clockspinning with buyback by paying , removing a time counter from Beacon of Tomorrows and returning Clockspinning to your hand.
8. 8Beacon of Tomorrows'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