Filigree Familiar, Mortuary, Krark-Clan Ironworks, and Cloud Key

Prerequisites

• Filigree Familiar on the battlefield
• Mortuary on the battlefield
• Krark-Clan Ironworks on the battlefield
• Cloud Key on the battlefield
• "Artifact" or "Creature" chosen with Cloud Key

Steps

1. Activate Krark-Clan Ironworks by sacrificing Filigree Familiar, adding
2. When Filigree Familiar dies, its second ability and Mortuary trigger
3. Resolve the Mortuary trigger, putting Filigree Familiar on top of your library from your graveyard
4. Resolve the Filigree Familiar trigger, causing you to draw Filigree Familiar
5. Cast Filigree Familiar by paying
6. When Filigree Familiar enters the battlefield, its first ability triggers, causing you to gain two life
7. Repeat

Results

• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count