Phase Inverse — the inverse of Phase. Still using matrices as an example: an inverse matrix possesses the Phase Inverse of the original matrix's elements.

This explanation is obviously too abstract. The concepts of Phase and Phase Inverse originally stem from matter and antimatter. If matter possesses a certain Phase, the corresponding antimatter has the corresponding Phase Inverse. For things where "Phase" equates to existence, when those of Phase and Phase Inverse meet, they annihilate like matter and antimatter — Mana being one such case. This is also the fundamental principle of //Shield Spell.

逆相，即“相 ”之逆。还是以矩阵为例，矩阵的逆矩阵拥有原矩阵元素的逆相。

这个解释显然过于抽象。“相”与“逆相”的思想最初源于物质与反物质，可以说，如果物质具有某种相，对应的反物质就具有对应的逆相。对于某些“相”即是存在的事物来说，具有相与逆相的二者相遇时就会像正物质与反物质一样堙灭，比如魔力，这也是护盾术 的基本原理。