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>ridiculously powerful creature with god-like powers and a UB
Literally Necrozma.
>inb4 Necrozma isn't a UB
There are several cards of TCG with Necrozma being catalogued as UB. It's a UB, just like Cosmog line.
>UB = pokemon from other dimension which power is linked to Z Power, like Cosmog's line or Necrozma that generate Z Power or Nihilego, Buzzwole and co. that has a Z powered aura as ability