Haru, Hidden Talent, Dryad Arbor, Maskwood Nexus, and Hammerhead, Maggia Boss

Prerequisites

• Haru, Hidden Talent on the battlefield
• Dryad Arbor in hand
• Maskwood Nexus on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

1. Play Dryad Arbor
2. When Dryad Arbor enters as an Ally due to Maskwood Nexus, Haru triggers, earthbending Dryad Arbor
3. Activate Dryad Arbor by tapping it, adding
4. Activate Hammerhead 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 Maskwood Nexus, Haru triggers, earthbending Dryad Arbor
7. Resolve the Hammerhead ability
8. Repeat from step 3

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite green mana
• Infinite landfall triggers