Ioreth of the Healing House, and Aphetto Alchemist

Prerequisites

• Ioreth of the Healing House on the battlefield
• Aphetto Alchemist on the battlefield
• Ioreth and Aphetto Alchemist do not have summoning sickness
• There is another legendary creature on the battlefield

Steps

1. If Aphetto Alchemist is not your Ring-bearer, use the card that causes the Ring to tempt you to cause Aphetto Alchemist to become your Ring-bearer, thus making it legendary
2. Activate Ioreth's second ability by tapping it, untapping Aphetto Alchemist and another legendary creature
3. Activate Aphetto Alchemist by tapping it, untapping Ioreth
4. Repeat from step 2

Results

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