Zirda, the Dawnwaker + Myr Propagator + Umbral Mantle + Ashnod's Altar

Zirda, the Dawnwaker

Myr Propagator

Umbral Mantle

Ashnod's Altar

How it works

1. Activate Myr Propagator by paying 1 and tapping it, creating a token copy of itself.
2. Activate Ashnod's Altar by sacrificing the Myr Propagator token, adding CC.
3. Activate Myr Propagator by paying 1 and untapping it, giving itself +2/+2 until end of turn.
4. Repeat.

This intricate loop turns Myr Propagator into an endless army by slashing activation costs and recycling mana. Zirda, the Dawnwaker does the heavy lifting from the command zone or battlefield, reducing the cost to activate Myr Propagator's cloning ability down to just a single mana. Once you have a copy, Ashnod's Altar steps in to convert your surplus tokens into raw colorless energy, sacrificing them for two mana each. Meanwhile, Umbral Mantle sits quietly equipped to the original Myr Propagator, granting an untap ability whose own activation cost is similarly cheapened by Zirda, the Dawnwaker, allowing the progenitor to endlessly multiply, pump, and feed the altar.