Time Sieve + Mycosynth Lattice + Rionya, Fire Dancer + Izoni, Thousand-Eyed

Time Sieve

Mycosynth Lattice

Rionya, Fire Dancer

Izoni, Thousand-Eyed

How it works

1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Izoni with haste.
2. Put the token Izoni into your graveyard due to the legend rule.
3. The Izoni token enters-the-battlefield ability triggers, creating at least five 1/1 Insect creature tokens.
4. Activate Time Sieve by tapping it and sacrificing the Insect tokens, causing you to take an extra turn after this one.
5. Repeat each turn.

This peculiar loop uses Mycosynth Lattice's global passive ability to turn every permanent on your battlefield into an artifact, satisfying Time Sieve's sacrifice requirement with ease. At the start of combat, Rionya, Fire Dancer generates a token copy of Izoni, Thousand-Eyed, which immediately swarms the board with Insect tokens thanks to its graveyard-counting enters-the-battlefield ability and the legend rule sending the extra copy away. You then feed those freshly minted creature tokens into Time Sieve to immediately cash them in for an extra turn. Meanwhile, Izoni, Thousand-Eyed can also leverage its own sacrifice ability for card draw and life gain if needed, cementing an infinite-turn lock.