Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite self-millPut all artifact creature cards with mana value 1 or less from your library onto the battlefieldPut all artifact creature cards with mana value 1 or less from your graveyard onto the battlefieldInfinite +1/+1 counters on creatures you control
How it works
Cast Technomancer by paying 5.
When Technomancer enters, it triggers, causing you to mill three cards and return Synth Infiltrator from your graveyard to the battlefield as a copy of Technomancer.
When Synth Infiltrator enters, it triggers. Holding priority, activate Extruder by sacrificing Synth Infiltrator.
Resolve the Synth Infiltrator trigger, causing you to mill three cards and return Synth Infiltrator from your graveyard to the battlefield as a copy of Technomancer.
Repeat from step 3.
This clever loop hinges on a recursive impersonation, starting when you cast Technomancer to pull Synth Infiltrator from your graveyard straight onto the battlefield. Because Synth Infiltrator can enter as a copy of any creature, it chooses to enter as a copy of Technomancer, triggering the same resurrection effect to keep the chain going. To keep the loop from stalling out and to capitalize on the cycle, Extruder steps in as a reliable sacrifice outlet that feeds the process while dumping endless +1/+1 counters onto your creatures.