Evolve Shaman doesn't even want to run this, because it's not actually a Battlecry and comes online way too late.

Weird Tech, but okay buddy. This isn't Marvel Snap, it's not like you're going to steal buffs with it, and doesn't even protect your own face from Fireballs Frozen Touches.

Really depends on how Undead-dense your deck is, but I'm willing to say it's 1 star.

Hello new Sire Denathrius, so nice to see you.

The self 2 damage shouldn't matter too much for Aggro decks, just getting a good board early makes it worth.

...You know, with Tome Tampering, not only will it give us a 6 damage burst, but also a 1 cost copy in the deck for later.

It doesn't cost 4 mana?! BLIZZARD, YOU WERE- oh wait I already made this joke before.
Doomrusher, is that something?

Such a disappointing effect for the Dragon in hand condition.

Backfire, but Discard instead of self-damage, seems pretty fantastic to me!

I'll stick to Naval Mines, thank you very much.

There's potential for Bomb Rogue to use this, but then again a good all at once clear gets rid of this.

Unfortunately not a whole lot of big Undeads available to cheat out atm.

SI: 7 Agent and Scalerider are ugly sobbing right now.

Someone is going to figure out how to get around the Battlecry and use it for OTKs, guaranteed.

Maaaaaaaaaaaaybe sees play in Enrage Warrior as a way to damage yourself.

Rather slow disruption, basically hoping that your opponent kills it and is willing to play it out. And then there's hoping that multiple Plaguespreaders don't transform other Plaguespreaders.

At 5 health, that's actually rather hard to kill on curve.

Listen. It's all fun and games until you swap something out for their Giant.

Freeze AND Silence? Interesting tech option.

So it's not a 4 mana 7/7?! YOU WERE THIS CLOSE BLIZZARD!