First, let me get this out of the way; The main reason for this suggestion is not to simply introduce new battle sprites, but to even out crystal consumption, and sanctum themes.
As you probably might have noticed, any theme requiring red, yellow, or purple crystals has become less likely to occur.
Enter these new sprites, which will feed off of the two remaining colors: green (slime) and blue (construct).
The slime sprite will consume "slimey" food, and will focus mainly on defending yourself and the party.
The construct sprite will basically be modeled after the E-Class surveillance drone that knights were supposed to get. It will feed off of "spark" food.
I know this is kinda lacking right now, but I'm still thinking of ideas. I'll come back with more later. Please tell me what you think in the mean time. : )
have been introduced here and here. Help add onto those if you don't have a more thought out version in your head. Hopefully if one of these gets thorough enough it gets implemented!