Nicol Bolas, Dragon-God, Jace, Cunning Castaway, and Ichormoon Gauntlet

Prerequisites

• Nicol Bolas, Dragon-God on the battlefield
• Jace, Cunning Castaway on the battlefield
• Ichormoon Gauntlet on the battlefield
• Nicol Bolas has at least five loyalty counters on it

Steps

1. Activate Nicol Bolas using Jace's third ability by removing five loyalty counters from it
2. If Nicol Bolas has zero loyalty, it dies as a state-based action
3. Resolve the Nicol Bolas ability, creating two token copies of Nicol Bolas that aren't legendary
4. Activate a Nicol Bolas token by putting zero loyalty counter on it, putting a loyalty counters on the other Nicol Bolas token
5. Repeat from step 1 using the second Nicol Bolas token

Results

• Infinite activations of loyalty abilities of Planeswalkers you control
• Infinite Nicol Bolas, Dragon-God tokens
• Infinite proliferate
• Infinite turns