Haru, Hidden Talent, Dryad Arbor, Bartolomé del Presidio, and Rukarumel, Biologist

Prerequisites

• Haru, Hidden Talent on the battlefield
• Dryad Arbor in hand
• Bartolomé del Presidio on the battlefield
• Rukarumel, Biologist on the battlefield

Steps

1. Play Dryad Arbor
2. When Dryad Arbor enters as an Ally due to Rukarumel, Haru triggers, earthbending Dryad Arbor
3. Activate Dryad Arbor by tapping it, adding
4. Activate Bartolomé del Presidio by sacrificing Dryad Arbor
5. When Dryad Abor dies, Haru triggers, returning Dryad Arbor from your graveyard to the battlefield
6. When Dryad Arbor enters as an Ally due to Rukarumel, Haru triggers, earthbending Dryad Arbor
7. Resolve the Bartolomé del Presidio ability
8. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Infinite +1/+1 counters on Bartolomé del Presidio
• Infinite green mana