Cathars' Crusade + Phyrexian Altar + Persist Creature

Prerequisites

• Persist Creature

Steps

1. 1Activate Phyrexian Altar by sacrificing the persist creature.
2. 2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. 3When the persist creature enters, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control.
4. 4Repeat

Effects

• Infinite +1/+1 counters on most creatures you control
• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers