Mazzy, Truesword Paladin, Phyrexian Altar, and Valor of the Worthy

Prerequisites

• Mazzy, Truesword Paladin on the battlefield
• Phyrexian Altar on the battlefield
• Valor of the Worthy in hand
• available

Steps

1. Cast Valor of the Worthy by paying , attaching it to another creature you control
2. Activate Phyrexian Altar by sacrificing the creature that has Valor of the Worthy attached to it, adding
3. Mazzy's second ability and Valor of the Worthy trigger
4. Resolve the Mazzy trigger, exiling Valor of the Worthy from your graveyard with the ability to cast it until the end of your next turn
5. Resolve the Valor of the Worthy trigger, creating a 1/1 Spirit creature token
6. Cast Valor of the Worthy by paying , attaching it to the Spirit
7. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite storm count