Extra Spell Attributes (RPG Series Tweaks)

Replaced Inevitability with Vulnerability system

Vulnerable can be applied on hit, for 8 seconds, becoming consumable when there is at most 4 seconds remaining.

Vulnerable makes targets take 20% more damage, and can be consumed for expanded effects.

Currently, there are four such effects: Armor break, Further increased damage taken, Spell crit chance increase, and Spell crit damage increase. 

Corresponding enchantments and rings have been added