User blog comment:Uncommon22/Do elements matter when leveling BB?/@comment-24462444-20140506205424

I feel the same way sometimes, but only the BB Type matters. On a side note... If your unit is above level 20, you should fuse the unit until it has reached its max Lv, then try to get the BB Lv up again. The cost goes down significantly when the unit reaches its max Lv.