Szarel, Genesis Shepherd, Scurry Oak, Sword of the Meek, and Krark-Clan Grunt

Prerequisites

• Szarel, Genesis Shepherd on the battlefield
• Scurry Oak on the battlefield
• Sword of the Meek on the battlefield
• Krark-Clan Grunt on the battlefield

Steps

1. Activate Krark-Clan Grunt by sacrificing Sword of the Meek When you sacrifice Sword of the Meek, Szarel triggers, putting a number of +1/+1 counters on Scurry Oak
2. Scurry Oak triggers, creating a 1/1 Squirrel creature token
3. When the Squirrel enters the battlefield, Sword of the Meek triggers, returning itself from your graveyard to the battlefield attached to the Squirrel
4. Resolve the Krark-Clan Grunt ability
5. Repeat

Results

• Infinite ETB
• Infinite creature tokens
• Infinite +1/+1 counters
• Infinitely powerful Krark-Clan Grunt until end of turn