Mister Gutsy, Nim Deathmantle, Krark-Clan Ironworks, and Captain Kathryn Janeway

Prerequisites

• Mister Gutsy on the battlefield
• Nim Deathmantle on the battlefield
• Krark-Clan Ironworks on the battlefield
• Captain Kathryn Janeway on the battlefield
• if Mister Gutsy doesn't have a +1/+1 counter on it available

Steps

1. Activate Krark-Clan Ironworks by sacrificing Mister Gutsy, adding
2. When Mister Gutsy dies, its second ability and Nim Deathmantle trigger
3. Resolve the Mister Gutsy trigger, creating a number of Junk tokens equal to the number of +1/+1 counters that were on it
4. If you created a Junk token, activate Krark-Clan Ironworks by sacrificing a Junk, adding
5. Resolve the Nim Deathmantle trigger, causing you to pay to return Mister Gutsy from your graveyard to the battlefield, and attaching Nim Deathmantle to it
6. When Mister Gutsy enters the battlefield, Captain Kathryn Janeway trigger, revealing the top card of your library, putting the card back on top of your library, and then putting a +1/+1 counter on Mister Gutsy Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers