O (Overload)

Strategy and Synergy
This upgrade is a highly situational one and should only be applied to spells with already high damage such as or, bumping their already-high damage even further. Before choosing Overload though, you must consider whether or not you can afford to discard the spell, because once an O spell is cast, they will be consumed on use for the current battle.

A somewhat exception for the rule is, but removing its self-replicating potential just for a repeatable 40-damage spell is not practical, given that most basic spells have their damage within that range.

Synergizes well with, and when coupled with , one can easily reach the 4-digit mark reliably, provided the spell hits.