Rastakhan's Rumble Guide
Deal 5 damage to all characters except Ysera.
I the zoo is a zoo, you're well dead before this card has a chance to be played
The destroyer of zoos.
Maaaaan, the artwork is fantastic!
This does not deal damage to Ysera so...it wouldn't damage your opponet's ysera as well
Compare to Hellfire. A card of this caliber would probably cost 5 or 6 mana on its own.
Just in general, the caliber of cards Ysera gives you is ridiculous. Emerald Drake is a 4 cost 7/6, which is a slightly different Boulderfist Ogre for 2 mana less. Or laughing sister, for 1 more mana than Faerie Dragon, gains 3 health. There are more, but i think that got the point across. Long story short, if Ysera survives, she will ensure great value.