Cayth, Famed Mechanist + Phyrexian Altar + Persist Creature

Prerequisites

• The persist creature does not have a -1/-1 counter on it.
• Persist Creature

Steps

1. 1Activate Phyrexian Altar by sacrificing the persist creature, adding one mana of any color.
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 the battlefield, its fabricate ability triggers, putting a +1/+1 counter on it.
4. 4Repeat.

Effects

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