Convulsive Purple Color Crystal

The Convulsive Purple crystal was added to the game's files in Patch 5.5, but it seems it never made it into the game itself. All we have is an icon, which ended up being the same aicon as the Umbaran Purple crystal uses. Interestingly, the Convulsive Purple crystal may have originally been intended as a Twitch viewer promotional free reward - in the game files it is called 'twitch_purple'. The developers seems to have been focusing on mounts and decorations as the regular twitch rewards, and wound up never making crystals a part of the promotion.