Permanent casting cost must support more than one value

Permantent casting cost can currently only be a fixed value, not an array of costs. But there are at least 3 spells that have different base costs with different permanent costs: Chimaeroform, Stein wandle, Totes handle.

The permanent cost needs to be a array.

The variable cost musst also be a array. This is needed for enchantment Sword of Flame.