Hofri Ghostforge + Mistmoon Griffin + Phyrexian Altar

Prerequisites

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Steps

1. 1Activate Phyrexian Altar by sacrificing Mistmoon Griffin, adding one mana of any color.
2. 2Mistmoon Griffin dies, triggering itself and Hofri Ghostforge.
3. 3Resolve the Hofri Ghostforge trigger, exiling Mistmoon Griffin from your graveyard and creating a token copy of Mistmoon Griffin that has "When this creature leaves the battlefield, return the exiled card to your graveyard".
4. 4Resolve the Mistmoon Griffin trigger, returning nothing from your graveyard to the battlefield.
5. 5Activate Phyrexian Altar by sacrificing the Mistmoon Griffin token, adding one mana of any color.
6. 6The Mistmoon Griffin token dies, triggering itself twice.
7. 7Resolve the Mistmoon Griffin token's trigger granted by Hofri Ghostforge, returning Mistmoon Griffin from exile to your graveyard.
8. 8Resolve the other Mistmoon Griffin trigger, returning Mistmoon Griffin from your graveyard to the battlefield.
9. 9Repeat.

Effects

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