the ATK gain is permanent, but 100 per monster in your graveyard is kinda....low, if your deck isn't focused on sending monsters to the Graveyard.
And such deck might be better off running other cards instead of this one.
This card is crap. Thanks for confirming how obviously crap is this card. Because it is obviously bad. And a bad card shouldnt be played. Because there are better cards to used instead of this bad card. Using such a bad card will make your deck bad. And a bad deck has less chances of winning. And if you dont win you loose. Avoid loosing by avoid using this card. Hope I helped.
I'm beginning to identify you because you keep writing "loose" instead of lose. You probably have an a$$ fetish, and hates to lose but is very bad at the game so you just waste time to spam here.
(I continue) Btw, please read the first post and tell me who is wasting time here. The guy made a post saying that this card is bad, which apparently is. It is like posting "larvae moth (or X crap card) is not a good card". This is spam.