Ioreth of the Healing House, Saryth, the Viper's Fang, and Kydele, Chosen of Kruphix

Prerequisites

• Ioreth of the Healing House on the battlefield
• Saryth, the Viper's Fang on the battlefield
• Kydele, Chosen of Kruphix on the battlefield

Steps

1. Activate Kydele by tapping it, adding at least Activate Saryth by paying and tapping it, untapping Ioreth
2. Activate Ioreth's second ability by tapping it, untapping Saryth and Kydele Repeat

Results

• Infinite mana legendary creatures you control can produce
• Infinite untap of legendary creatures you control