Modified - 6/10 (Well, you can tank with it using Special :metal:, but yeah I've never got how this was good, just seems so slow, I still think whoever placed high with it at Worlds was more lucky than Steelix Prime being good)
So I came here to see what awesome things people were saying about Steelix, then I saw this. :nonono:
Just because you can't see why a card is good doesn't make it a bad card. I could very well point out all the bad things about any popular card right now (Luxray X only does 60 damage, Garchomp X needs 3 energies to do 80, etc.). I'll admit, having to use Energy Stream a couple of times before you can even hit with Gaia Crush seems pretty slow. But that's why Steelix works best in a healing deck - you have to keep the damage off of it until you can start swinging for 120. Once you start hitting for 120 (130 with Skuntank G that can't poison Steelix), you OHKO many cards in the format. Just about the only thing you don't OHKO - aside from random stuff - is Dialga G Lv.X with Special Metal and Expert Belt (Steelix plays either Ruins of Alph or PlusPower to deal with Luxray X).
Consider the card when I played it at Worlds. It had psychic resistance, powerful against many popular cards at the time such as Gardevoir SW, Gengar AR, and Gengar SF. It ran Judge effectively against decks like Luxchomp and Gyarados. Unlike Regigigas X, it was safe from Machamp SF. Unlike Donphan Prime, Crobat G couldn't hurt it. It had high HP basics, meaning that you rarely got donked. I could go on and on...
I spent a great deal of time perfecting my list just before Worlds, going back and forth on almost every card in my deck, so it's kind of insulting for you to just say I got lucky at Worlds to get top 32. As The_Legend stated, I feel I got more unlucky than anything, facing one of two decks out of all of Worlds that had a fire tech in it capable of taking down a Steelix (not counting ERL because of issues people had with playing it; most people didn't even run a fire energy to use Detonation Spin). Just saying...
Edit: Also Regis, just wanted to say that you usually do great reviews for the COTD, so no hate coming from me! But really, where's the love for Steelix, one of the few cards that can actually survive in this messed up format?