Prerequisites
- Prototype Portal on the battlefield
- Dross Scorpion on the battlefield
- March of the Machines on the battlefield
- Ancient Den in exile
Steps
- Activate Prototype Portal by paying and tapping it, creating a token copy of Ancient Den
- The Ancient Den token enters the battlefield as a 0/0 creature due to March of the Machines, and dies as a state-based action due to having zero or less toughness
- Dross Scorpion triggers, untapping Prototype Portal
- Repeat
Results
Required Cards 4
Dross Scorpion
Artifact Creature — Scorpion
March of the Machines
Enchantment