Yeah this is literally just a Deathstalker Rexxar card.
This with any high health minion/taunt/stealth is just gross.
EDIT: Actually, wait, crap it's in the wrong pool. This might be kind of bad now that I think about it. It combines really badly with all the common effect beasts. The only good results are Nesting Roc, Knuckles, Tundra Rhino, Bearshark, Dispatch Kodo, Emerald Hive Queen.
Fiery Bat works because the deathrattle is poisonous too. Same with Explosive Bloatbat. But those are incredibly expensive for a delayed board clear unless you have some way to kill it.
I think this is way worse than if it was in the first pool, but it's okay for Deathstalker Rexxar.