Barbara Wright, Myojin of Grim Betrayal, and Summon: Knights of Round

Prerequisites

• Barbara Wright on the battlefield
• Myojin of Grim Betrayal on the battlefield
• Summon: Knights of Round in the graveyard

Steps

1. Activate Myojin of Cryptic Dreams by removing an indestructible counter from it, putting Summon: Knights of Round from your graveyard onto the battlefield, and choosing to have it enter with five lore counters on it due to its read-ahead ability
2. The Summon: Knights of Round token's fifth chapter ability triggers, causing creatures you control to get +2/+2 until end of turn and putting an indestructible counter on each of them, and then causing you to sacrifice the Summon: Knights of Round token
3. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinitely large creatures until end of turn