Felidar Guardian, and Restoration Angel

Prerequisites

• Felidar Guardian in hand
• Restoration Angel on the battlefield
• available

Steps

1. Cast Felidar Guardian by paying its mana cost
2. When Felidar Guardian enters, it triggers, blinking Restoration Angel
3. When Restoration Angel enters, it triggers, blinking Felidar Guardian
4. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB