Jace, Cunning Castaway, Oath of Gideon, and The Chain Veil

Prerequisites

• Jace, Cunning Castaway on the battlefield
• Oath of Gideon on the battlefield
• The Chain Veil on the battlefield
• Jace has at least five loyalty counters on it
• available

Steps

1. Activate The Chain Veil by paying and tapping it, allowing you an additional activation of your planeswalkers' loyalty abilities this turn
2. Activate Jace's third loyalty ability by removing five loyalty counters from it, creating two token copies of Jace that aren't legendary, which each enter the battlefield with four loyalty counters on them due to Oath of Gideon
3. Activate a Jace token's first loyalty ability by putting a loyalty counter on it
4. Activate a Jace token's third loyalty ability by removing five loyalty counters from it, creating two token copies of Jace that aren't legendary, which each enter the battlefield with four loyalty counters on them due to Oath of Gideon
5. Repeat from step 3

Results

• Infinite ETB
• Infinite creature tokens
• Infinite Jace, Cunning Castaway tokens