Wow, another Shaman board clear spell for me to watch out for.

Sure, but you could only afford to play Oblivitron if you aren’t being pressed by your opponent. And the only decks where you still aren’t being pressured at turn six would be Resurrect Priest. But even resurrect priest can just psychic scream your oblivitron and whatever minion you play next turn.

And if you aren’t playing against resurrect priest you’re going to do even worse. You could be playing aggro paladin or zoolock where if you spend your sixth turn playing a weak statted minion that doesn’t even have taunt, you’re going to get smacked in the face and lose ten to fifteen health. Then, on your seventh turn you could finally trade in your oblivitron against one of your opponent’s minions and trigger its deathrattle. But there aren’t any hunter mechs that happen to have a deathrattle of summoning any kind of taunt as far as I’m aware, so even if you do generate a bunch of value your opponent’s just going to hit you in the face again for another ten to fifteen damage.

If this was a rogue card, I suppose there could be potential synergies with blightnozzle crawler to generate immediate value with a 1/1 with poisonous and rush, but it’s not a rogue card. Usually you’d have to wait two turns for the full value of this card to be put into effect.

Malygos and Kalecgos together would be insane – imagine a fifteen damage zero mana pyroblast.

Sure, this card is good but you have to take into account the other cards that are coming out in the next expansion too. The new priest spell Forbidden Words, which probably would become meta, can kill Kalecgos for just four mana instantly.

Not saying this card is bad, just saying that there’s probably lots of counters to it.