Horde of Notions, Ashling's Command, and Nyxbloom Ancient

Prerequisites

• Horde of Notions on the battlefield
• Ashling's Command in hand or in the graveyard
• Nyxbloom Ancient on the battlefield
• if Ashling Command is in your hand, or if it's in your graveyard, plus an additional in colored mana that is at least three different colors available

Steps

1. If Ashling's Command is in your graveyard, activate Horde of Notions by paying , causing you to cast Ashling's Command from your graveyard without paying its mana cost
2. Otherwise, cast Ashling's Command by paying
3. Resolve Ashling's Command, creating two Treasure tokens and choosing any other mode
4. Activate the Treasures by tapping and sacrificing them, adding three mana in each of two different colors
5. Repeat

Results

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