Time Sieve + Encroaching Mycosynth + Elemental Mastery

Time Sieve

Encroaching Mycosynth

Elemental Mastery

How it works

1. Activate the creature with Elemental Mastery attached by tapping it, creating at least five 1/1 Elemental creature tokens.
2. Activate Time Sieve by tapping it and sacrificing five Elemental tokens, causing you to take an extra turn after this one.
3. Repeat each turn.

By weaving Encroaching Mycosynth into your strategy, every single nonland permanent you control instantly becomes an artifact, quietly transforming your entire board into viable fuel. This foundation allows Elemental Mastery to enchant a creature with high power and repeatedly tap to flood the board with haste-granting Elemental tokens. Once those tokens hit the battlefield, Time Sieve steps in to instantly sacrifice five of them to claim an extra turn, letting you untap and repeat the cycle indefinitely for a complete lock on the game.