Time Sieve + Encroaching Mycosynth + Delina, Wild Mage + Underworld Hermit

Prerequisites

• Delina does not have summoning sickness and cannot be blocked and killed by an opponent.

Steps

1. 1Declare Delina as an attacker.
2. 2Delina triggers, creating at least one token copy of Underworld Hermit with haste.
3. 3When the Underworld Hermit token enters the battlefield, it triggers, creating at least four 1/1 Squirrel creature tokens.
4. 4Activate Time Sieve by tapping it, sacrificing the Underworld Hermit token and the Squirrel tokens, causing you to take an extra turn after this one.
5. 5Repeat each turn.

Effects

• Infinite turns
• Lock