Time Sieve + Myr Battlesphere + Conjurer's Closet + Gandalf the White

Time Sieve

Myr Battlesphere

Conjurer's Closet

Gandalf the White

How it works

1. At the beginning of your end step, Conjurer's Closet triggers, blinking Myr Battlesphere.
2. When Myr Battlesphere enters the battlefield, its first ability triggers twice, creating eight 1/1 Myr artifact creature tokens.
3. Activate Time Sieve by tapping it and sacrificing five Myrs, causing you to take an extra turn after this one.
4. Repeat each turn.

This brilliant engine turns your end step into an infinite sequence of extra turns by constantly recycling a massive robotic army. It all kicks off when Conjurer's Closet exiles and returns Myr Battlesphere to the battlefield, a move supercharged by Gandalf the White to double the incoming artifact tokens into eight fresh Myr. With your ranks fully stocked, Time Sieve happily gorges on just five of those sacrificial artifacts to secure you yet another full turn, locking opponents out of the game entirely as the loop resets.