Toph, the First Metalbender + Retreat to Emeria + Haru, Hidden Talent + Lotus Petal

Prerequisites

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Steps

1. 1Cast Lotus Petal by paying its mana cost.
2. 2When Lotus Petal enters, Retreat to Emeria triggers, creating a 1/1 Kor Ally creature token.
3. 3When the Kor Ally enters, Haru triggers, earthbending Lotus Petal.
4. 4Activate Lotus Petal by tapping and sacrificing it.
5. 5Haru triggers, returning Lotus Petal from your graveyard to the battlefield.
6. 6Repeat from step 2

Effects

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite colored mana
• Infinite creature ETB
• Infinite creature tokens
• Infinite landfall triggers