If the target creature is an illegal target when Enter the Enigma tries to resolve, it won't resolve and none of its effects will happen
Ancient Gear Commander X EARTH Level 4 [ MachineEffect ] ATK 500 DEF 2000 You can send 1 "Ancient Gear Golem" from your hand, Deck, or face-up Monster Zone to the GY
You could also consider buying a structure deck, which is a deck carefully prepared with a specific strategy in mind
(1) If you control a Fusion Monster that must be Special Summoned with Dark Fusion, you can Special Summon this card (from your hand)
Most red-based token commanders get a lot out of this effect, but I think the new Atla Palani, Nest TenderAtla Palani, Nest Tender has the quirkiest use of the spell
Weakness: Fire Resistance: none Retreat: 3 Charizard VMAX - Fire - 330 HP Pokmon - VMAX - Evolves from Charizard V CCC Claw Slash 100 RRRCC G-Max Wildfire 300 Discard 2 Energy from this Pokmon