Hearthpwn

and 

Let's think about this for a moment... 

not less than one, clowns

This card is gonna make me quit wild at this rate. Either increase it's mana cost to 3 mana or make it "but not less than (1)"

But not less than 1, you small indie company.

still broken still op STILL NOT NERFED DEVS STILL DUMB AF

they really still have decided not to nerf this card when its been completely broken and people have asked for nerfs for YEARS haha you devs are wild it is a wonder how you sht-for-brains have not been fired and replaced yet

this card is op BROKEN NERF IT ALREADY we are all tired of the cancer decks that this card enables TIRED OF IT

It's time to make it so that spells won't coss less than 1

play sound gives me PTSD 

everytime she say "Me... ?" , i rethink my planned moves..

Even with a Freeze Mage it would probably be rare, but imagine dropping two of these with 2 Frostbolt and 2 Ice Lance. Maybe a Fireball or two if they run with some. That's a 20-26 damage turn for 6-8 mana, but very unlikely outcome.  

HowlingLotus, it just happened to me, got 30 health OTK with azure drake on board 

Does this effect stack with two apprentices on the field?

From the description, shouldn't this card have the possibility of making spells cost -ive mana?

After all "(1) less than" 0 = -1.

"Less" is the operating word here. -12 is "something", and less of something always moves towards 0. The only integer you cannot have less of.