Which Mana is a two Mana Troop of?

Talking about Siren (for example):
“Deal [Magic + 1] damage to an Enemy, and create 9 Gems of one of their Mana Colors.”

From a 2-Mana-Troop which Mana does she choose?

I feel it’s important to know this but I tried myself and had some confusing experience… :grinning:

It’s random or 50/50 in which mana color your Siren will create out of the two mana colors a specific troop have.

And then it obviously will be 33,33 % chance for her to pick any of the colors from a base Mythic troop.