Time Sieve + Myr Battlesphere + Thassa, Deep-Dwelling + Gandalf the White

Time Sieve

Myr Battlesphere

Thassa, Deep-Dwelling

Gandalf the White

How it works

1. At the beginning of your end step, Thassa 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 elegant loop harnesses Thassa, Deep-Dwelling to continuously recycle your army during the end step, while Gandalf the White steps in to double the token generation from Myr Battlesphere's arrival by exploiting its artifact nature. With a fresh crop of eight mechanical minions every single cycle, you easily have enough fuel to sacrifice five of them to Time Sieve, trading a fraction of your artifact horde for an endless stream of extra turns.