But Deathgazer isn't good in the environment. Deathgazer is not good against Rebels at all. They couldn't care less about losing one creature; they just replace them. All they have to do is attack you with bears until you block one with the 'Gazer. Then, you lose. And attacking isn't good either, cause they'll just block it with a random bear, then summon 2 more at the end of your tun. Then, you'll lose. All it does at best is kill one creature, and it isn't even your choice of which creature. Strictly speaking, you'd be better off with a Terror, Banish, or any one of those other cards. 4 mana to make your opponent lose a creature of his choice means nothing. And then, I'd refer you to Cat's comments above; he pretty much tells you why every one of those cards is not any good.