Time Sieve + Mycosynth Lattice + Delina, Wild Mage + Abhorrent Overlord

Time Sieve

Mycosynth Lattice

Delina, Wild Mage

Abhorrent Overlord

How it works

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

This loop relies on Mycosynth Lattice to turn everything on your board—including the tokens generated by Abhorrent Overlord—into artifacts, making them ready fodder for Time Sieve. As Delina, Wild Mage swings in, her attack trigger lets you roll for a chance to copy Abhorrent Overlord, whose massive black mana cost immediately yields a swarm of Harpy tokens thanks to its entering-the-battlefield trigger. You then tap Time Sieve and sacrifice that freshly minted Abhorrent Overlord alongside four Harpies to claim an extra turn, repeating the process to lock down the game with endless actions.