Clock of Omens, Coin of Mastery, and Kaya, Geist Hunter

Prerequisites

• Clock of Omens on the battlefield
• Coin of Mastery on the battlefield
• Kaya, Geist Hunter on the battlefield

Steps

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn
2. Activate Coin of Mastery by tapping it, creating two Treasure tokens due to Kaya, Geist Hunter
3. Activate Clock of Omens by tapping the two tokens, untapping Coin of Mastery
4. Repeat from step 2

Results

• Infinite tapped Treasure tokens