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

Roboct1

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

Gamer

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

Roboct1

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

Unknown

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Roboct1

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

Unknown

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