Myr Propagator, Umbral Mantle, Ashnod's Altar, and Power Artifact

Prerequisites

• Myr Propagator on the battlefield
• Umbral Mantle on the battlefield
• Ashnod's Altar on the battlefield
• Power Artifact on the battlefield
• Umbral Mantle and Power Artifact attached to Myr Propagator
• Myr Propagator does not have summoning sickness
• available

Steps

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

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely large Myr Propagator until end of turn
• Infinite sacrifice triggers