Requires

Dual Nature must be on the battlefield. Enduring Renewal must be on the battlefield. Basal Sliver must be in hand. Mana needed:

Steps

1. Cast Basal Sliver by paying .
2. Basal Sliver enters the battlefield triggering Dual Nature, creating a token copy of Basal Sliver.
3. Activate the token Basal Sliver by sacrificing it, adding .
4. Activate the Basal Sliver by sacrificing it, adding .
5. Dual Nature and Enduring Renewal trigger.
6. Resolve the Dual Nature trigger, exiling all creatures named Basal Sliver.
7. Resolve the Enduring Renewal trigger, returning Basal Sliver from your graveyard to your hand.
8. Repeat.

Results