Horde of Notions, Ashling's Command, and Xorn

Prerequisites

• Horde of Notions on the battlefield
• Ashling's Command in hand or in the graveyard
• Xorn on the battlefield

Steps

1. If Ashling's Command is in your hand, cast it by paying
2. If Ashling's Command is in your graveyard, activate Horde of Notions by paying , casting Ashling's Command from your graveyard without paying its mana cost
3. Resolve Ashling's Command, creating a token copy of Xorn, and then creating four Treasure tokens
4. Activate four Treasure tokens by tapping and sacrificing them, adding four mana of four different colors
5. Activate Horde of Notions by paying , casting Ashling's Command from your graveyard without paying its mana cost
6. Resolve Ashling's Command, creating a token copy of Xorn, and then creating a number of Treasure tokens equal to two plus the number of Xorns you control
7. Activate five Treasures by tapping and sacrificing them, adding
8. Repeat from step 4

Results

• Infinite ETB
• Infinite colored mana
• Infinite storm count
• Infinite creature tokens
• Infinite magecraft triggers
• Infinite Treasure tokens
• Infinite card draw for any number of players
• Infinite draw triggers for any number of players
• Infinite token copies of Elementals you control