The original ATK of this card is the number of your removed from play Dinosaur Type monsters x1000
I love to use this card after I have successfully played Survival Instinct. But it can be targeted by every trap, spell, and monster effect. I have gotten it's attack up to 12000 in one duel though. Anyway just have a couple of Survival Instincts and you can seriously beef this bad boy up.
I give this card a 2.5/5. Due to it being so vulnerable to effects and what-not.