Flitwing, Lyev Detective, Ulvenwald Mysteries, and Krark-Clan Grunt

Prerequisites

• Flitwing, Lyev Detective on the battlefield
• Ulvenwald Mysteries on the battlefield
• Krark-Clan Grunt on the battlefield

Steps

1. Activate Krark-Clan Grunt by sacrificing a Clue
2. Ulvenwald Mysteries' second ability triggers, creating a Clue token due to Flitwing
3. Resolve the Krark-Clan Grunt ability, giving Krark-Clan Grunt +1/+0 and first strike until end of turn Repeat

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinitely powerful creature until end of turn