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

Time Sieve

Encroaching Mycosynth

Delina, Wild Mage

Underworld Hermit

How it works

1. Declare Delina as an attacker.
2. Delina triggers, creating at least one token copy of Underworld Hermit with haste.
3. When the Underworld Hermit token enters the battlefield, it triggers, creating at least four 1/1 Squirrel creature tokens.
4. Activate 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. Repeat each turn.

This clever loop revolves around turning your entire team into fodder to fuel Time Sieve for infinite extra turns. Encroaching Mycosynth is the silent architect here, making nonland permanents you control artifacts—which crucially transforms all your creatures and tokens into valid sacrifices for Time Sieve's ability. Meanwhile, Delina, Wild Mage initiates the attack phase by rolling to create tapped and attacking token copies of Underworld Hermit. Each time an Underworld Hermit token enters the battlefield, its ability floods the board with 1/1 Squirrel creature tokens based on your devotion to black, providing precisely the five sacrificial bodies Time Sieve demands to instantly grant you another turn.