is it possible ?

Hi,

i'm currently working on my RPG XP game, and the progres is going good so far, but I've been thinking about a unique skill for one of my character. Now i'm wondering if its possible :

1. To make a skill in the game by means of a script
2. Have the skill consist of 4 elemental spells each wich its own animation and effects
3. to raise the mp cost depending on the level of the caster.
4. change the attributes

I don't need exact code for it, but I'd just want to know if its possible to create it trough Ruby

I think that's all possible with RGSS. The first one I'm sure, the 2nd one might be hard but yes. The 3rd definetly, the 4th I didn't get it lool.