Number 1: Numeron Gate Ekam (MGED-EN083)

3 Level 1 monsters

Cannot be destroyed by battle. At the end of the Damage Step, if this card battled an opponent's monster: You can detach 1 material from this card; double the ATK of all "Numeron" monsters you currently control, until the end of this turn.

Machine / Xyz / Effect, Maximum Gold: El Dorado