Scrap Trawler, Krark-Clan Ironworks, Salvaging Station, and Hangarback Walker

Prerequisites

• Scrap Trawler on the battlefield
• Krark-Clan Ironworks on the battlefield
• Salvaging Station on the battlefield
• Hangarback Walker in the graveyard
• You control a nontoken noncreature artifact with mana value one or less

Steps

1. Activate Krark-Clan Ironworks by sacrificing the nontoken noncreature artifact, adding
2. Scrap Trawler triggers, returning Hangarback Walker from your graveyard to your hand
3. Activate Salvaging Station by tapping it, returning the noncreature artifact from your graveyard to the battlefield
4. Cast Hangarback Walker by paying
5. Hangarback Walker enters the battlefield and dies as a state-based action due to having zero toughness
6. Scrap Trawler and Salvaging Station trigger
7. Resolve the Salvaging Station trigger, untapping itself
8. Resolve the Scrap Trawler trigger, returning nothing from your graveyard to your hand
9. Repeat
10. Once you have infinite mana, you may use it to cast Hangarback Walker, and then sacrifice Hangarback Walker to Krark-Clan Ironworks to get infinite 1/1 Thopter creature tokens

Results

• Infinite +1/+1 counters on Hangarback Walker
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count