Rukarumel, Biologist, Bog Glider, Dryad Arbor, Thornbite Staff, and Mortuary

Prerequisites

• Rukarumel, Biologist on the battlefield
• Bog Glider on the battlefield
• Dryad Arbor on the battlefield
• Thornbite Staff on the battlefield
• Mortuary on the battlefield
• Bog Glider does not have summoning sickness
• Thornbite Staff attached to Bog Glider
• "Mercenary" chosen with Rukarumel

Steps

1. Activate Bog Glider by tapping it and sacrificing Dryad Arbor
2. When Dryad Arbor dies, Mortuary and Bog Glider trigger
3. Resolve the Bog Glider trigger, untapping it
4. Resolve the Mortuary trigger, putting Dryad Arbor on top of your library from your graveyard
5. Resolve the Bog Glider ability from step 1, searching your library for Dryad Arbor and putting it onto the battlefield
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB
• Infinite sacrifice triggers