Mikaeus, the Unhallowed + Phyrexian Altar + Solemnity

Prerequisites

• You control at least one additional nontoken, non-Human creature that does not have a +1/+1 counter on it.

Steps

1. 1Activate Phyrexian Altar by sacrificing the additional creature, adding one mana of any color.
2. 2When the creature dies, its undying ability triggers, returning it to the battlefield from your graveyard with zero +1/+1 counters due to Solemnity.
3. 3Repeat.

Effects

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers