So this might sound awkward but this card is only supposed to be able to become a copy of an artifact that has charge counters on it. I realize it could sound like this card becomes a copy any target artifact and then gains charge counters.

"Until end of turn, ~ becomes a copy of target artifact that has one or more charge counters on it." Kind of like Magewright's Stone's template.

Um, not quite sure why you charge it up now - is activating supposed to cost a counter? Or did you just want it to be able to copy itself for no effect?

(Or is this actually supposed to be 'put a charge counter on target artifact' - which would make a lots more sense)

Oh, no, wait - I get it. Artifacts with charge counters tend to have ways to use them; and copying them won't copy the counters. So charge this up, and then it can become the Pentad Prism of your choice :)

Yeah, this seems good to me. Cheaper to charge than something like Magistrate's Scepter or Titan Forge, and easier to charge than Spawning Pit or Conversion Chamber. Nice.