Overbloat

Overbloat is a condition where a person starts absorbing more mana than their body us used to, causing the person to expand. Most of this results in a bigger belly, butt, and (in the case of women only) breasts. While useful for tweaking proportions, it can easily result in a chain reaction that causes the person to literally explode.

Trivia

 * The explosion is the only way to make a Necroid, more specifically their N-Core. This however only works for women.
 * When a man overbloats, instead of exploding his body dissolves into ash. No one knows why that is.