Glarb, Calamity's Augur, Valley Floodcaller, Eye of Duskmantle, Sensei's Divining Top, and Aetherflux Reservoir

Prerequisites

• Glarb, Calamity's Augur on the battlefield
• Valley Floodcaller on the battlefield
• Eye of Duskmantle on the battlefield
• Sensei's Divining Top on the battlefield
• Aetherflux Reservoir on the battlefield
• Glarb does not have summoning sickness
• Your life total is at least 2

Steps

1. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Diving Top from the battlefield onto the top of your library
2. Activate Glarb by tapping it, causing you to surveil 2, ensuring to put Sensei's Divining Top into your graveyard
3. Cast Sensei's Divining Top from your graveyard by paying 1 life due to Eye of Duskmantle
4. Valley Floodcaller and Aetherflux Reservoir trigger
5. Resolve the Valley Floodcaller trigger, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them
6. Resolve the Aetherflux Reservoir trigger, causing you to gain 1 life for each spell you've cast this turn
7. Repeat

Results

• Near-infinite damage
• Infinite card draw
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Infinite draw triggers
• Near-infinite storm count
• Near-infinitely large Birds, Otters, Rats and Frogs you control until end of turn
• Near-infinite surveil 2
• Near-infinite untap of Birds, Otters, Rats and Frogs you control