Taigam, Master Oppurtunist, Clockspinning, and Beacon of Tomorrows

Prerequisites

• Taigam, Master Oppurtunist on the battlefield
• Clockspinning in hand
• Beacon of Tomorrows in hand
• the first turn with each other turn available

Steps

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

Results

• Infinite turns