Transmutation Font, Clock of Omens, and Ertha Jo, Frontier Mentor

Prerequisites

• Transmutation Font on the battlefield
• Clock of Omens on the battlefield
• Ertha Jo, Frontier Mentor on the battlefield

Steps

1. Activate Transmutation Font's first ability by tapping it, creating your choice of a Clue, Food or Blood artifact token
2. Activate Clock of Omens by tapping the token and an artifact creature, targeting the artifact creature
3. Ertha Jo's second ability triggers, copying Clock of Omens' ability, targeting Transmutation Font
4. Resolve both Clock of Omens abilities, untapping Transmutation Font and the artifact creature
5. Repeat

Results

• Infinite tapped Food tokens
• Infinite tapped Clue tokens
• Infinite tapped Blood tokens