MTG Combo: Pitiless Plunderer + Thopter Assembly + Time Sieve

This generates infinite turns, infinite token etbs, infinite artifacts entering the battlefield, infinite sac triggers, and infinite mana.

1. Have all three on the battlefield at the beginning of your upkeep.
2. The upkeep trigger of Thopter Assembly procs, returning it to your hand and creating 5 1/1 thopter tokens.
3. Activate Time Sieve, saccing the 5 thopters tokens and gaining an extra turn.
4. Pitiless Plunderer procs, creating 5 treasure tokens.
5. Recast Thopter Assembly, making sure to not use all the treasure tokens.
6. Repeat during the extra turn.