Time Sieve + Encroaching Mycosynth + Delina, Wild Mage + Phylath, World Sculptor

Time Sieve

Encroaching Mycosynth

Delina, Wild Mage

Phylath, World Sculptor

How it works

1. Declare Delina as an attacker.
2. Delina triggers, creating at least one nonlegendary token copy of Phylath with haste.
3. When the Phylath token enters the battlefield, its first ability triggers, creating at least four 0/1 Plant creature tokens.
4. Activate Time Sieve by tapping it, sacrificing the Phylath token and the Plant tokens, causing you to take an extra turn after this one.
5. Repeat each turn.

This brilliant recursive loop hinges on Encroaching Mycosynth, which turns all your nonland permanents into artifacts so they can be fed directly into Time Sieve. When Delina, Wild Mage charges into combat, her chaotic dice rolls create a flurry of nonlegendary token copies of Phylath, World Sculptor. Each time a Phylath token enters, it immediately spawns a fresh crop of 0/1 Plant creature tokens that instantly double as valuable artifact fodder. By sacrificing the Phylath token along with four of those newly minted Plants to Time Sieve, you cash them in to seize infinite extra turns and completely lock down the game.