Chulane, Teller of Tales, Retreat to Coralhelm, Nyxbloom Ancient, Horizon Explorer, and Azorius Chancery

Prerequisites

• Chulane, Teller of Tales on the battlefield
• Retreat to Coralhelm on the battlefield
• Nyxbloom Ancient on the battlefield
• Horizon Explorer on the battlefield
• Azorius Chancery in hand

Steps

1. Cast the creature in your hand by paying its mana cost
2. Chulane triggers, causing you to draw a card and put Azorius Chancery from your hand onto the battlefield untapped due to Horizon Explorer
3. When Azorius Chancery enters, it and Retreat to Coralhelm trigger
4. Holding priority, activate Azorius Chancery by tapping it, adding due to Nyxbloom Ancient
5. Resolve the Azorius Chancery trigger, returning it from your hand to the battlefield
6. Resolve the Retreat to Coralhelm trigger, untapping Chulane
7. Resolve the creature spell cast in step 1
8. Activate Chulane by paying and tapping it, returning the creature from the battlefield to your hand
9. Repeat

Results

• Infinite card draw
• Near-infinite ETB
• Infinite draw triggers
• Near-infinite storm count
• Near-infinite landfall triggers
• Near-infinite LTB