Phyrexian Altar + Host of the Hereafter + 2x Persist Creature + Increases +1/+1 Counter Placement but not -1/-1

Prerequisites

• At least one persist creature has a +1/+1 counter on it.
• 2x Persist Creature; Increases +1/+1 Counter Placement but not -1/-1

Steps

1. 1Activate Phyrexian Altar by sacrificing the persist creature that has a +1/+1 counter on it, adding one mana of any color.
2. 2When that creature dies, its persist ability and Host of the Hereafter trigger.
3. 3Resolve Host of the Hereafter's ability, putting at least two +1/+1 counters onto the surviving persist creature due to the counter-increasing effect.
4. 4If that creature had a -1/-1 counter on it, remove that and one of the +1/+1 counters from it as a state-based action.
5. 5Resolve the persist ability from step 2, returning the persist creature from your graveyard to the battlefield with a -1/-1 counter.
6. 6Repeat.

Effects

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