PS2 Project Proposal

I handed in my project proposal for the PS2 module. I plan on allowing the player to 'cast spells' by shooting a fire ball at enemies and the enemies will catch fire too. I'll need a model of some kind to represent the enemies and ill need a chase function so they chase the player, then some kind of collision detection, box probably, nothing fancy. The fire ball will be the main feature as I want it to be an animated texture on a sphere model. I've done this before in my Direct X module last semester so I understand the theory. I need 3 textures of varying opaqueness and layer them on top of each other over the sphere. Then I have to cycle each texture across the surface at different speeds.