[VX] Additional attack (skill) effects

[zerothedarklord]

I'd like to get, if I may, a script that allows extra things to occur when skills are used, through use of note tags placed within the note box of the skill.
Some things I'd like available:
Example: <on crit> would make it so that something happens when the skill hits critically. Specifically, the effect I'm looking for is for it to be able to call a common event when the skill hits critically. The idea I had behind it is to sort of replicate the fire mage Ignite ability from World of Warcraft, where upon scoring a critical hit, the target suffers additional damage over time, however if it is able to call a common event, I can make use of it in many more ways.

If anyone has any additional ideas to add, in addition to <on crit>, please feel free to add your ideas.
So far:
<on crit>
<if fatal> (if the skill kills the target or the user)