Shadow Crystals and what I do to get lots of them, in descriptions
What I do is keep a close eye on the amount of Shadow Crystals my group has gotten, you don't want them to reach their max limit or else they will gain nothing when they destroy the Crystal Guards.
Unfortunately it appears that you need helpers to boost the size of the sack that holds the Shadow Crystals in them. The more power you have, the faster you will defeat the Crystal Ponies and get Shadow Crystals. If you can't buy helpers, I suggest saving up for as many Shadow Crystals as you can to buy the best armor you can get for Sombra.
As far as I can tell, Sombra armor in Rarities cloths shop do not have a power requirement. From what I can tell the Power number by the Armor pieces you want to craft is the number it will give you if you have it made.
If for any reason you think you can not beat this campaign, I recommend you just save up all the Shadow Crystals you can, because they will convert to Rubies after this campaign. With as many as I have now, I could buy three 2k priced Characters.
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