5* Colossus Costs 0 Gold to Rank 3 to Rank 4 with 2015 Gem

Didn't appear with any of my other gems (2015 or otherwise), although I had no other mutants to look at either.

Comments

Yes that because it 2015 gym ther don’t cost gold to rank op

Gems still cost gold to use, they just bypass using rank up material.

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Huh, well TIL. I swear had to pay gold on my other 2015 gems, was that a recent(ish) change?

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