Phantom Train + Phyrexian Metamorph + Technomancer
Phantom Train
Artifact — Vehicle
Phyrexian Metamorph
Artifact Creature — Phyrexian Shapeshifter
Technomancer
Artifact Creature — Necron Wizard
Result
- Infinite artifact ETB
- Infinite artifact LTB
- Infinite artifact sacrifice triggers
- Infinite creature LTB
- Infinite creature ETB
- Infinite creature sacrifice triggers
- Infinite death triggers
- Infinite self-mill
- Infinite +1/+1 counters on a creature
- Put all artifact creature cards with mana value 2 or less from your library onto the battlefield
- Put all artifact creature cards with mana value 2 or less from your graveyard onto the battlefield
Combo data from Commander Spellbook.