the creater(hostile mob with a twist)

the creater would be differant to all other monters, because it would cause you poison when you looked at it and shoot fireballs. it would have 1/2 a heart. when you kill it it drops noth, but every minute 5 expereince orbs will be dropped by it so you need to hide from it and when it leaves ou can collect expereance. this would add a mob differant to all others. im not to sure where it would spwn and what it woud look like(tell me if you think you have an idea on that).