Big Brain Inner Demon Hunter

Using cheap spells to damage the enemy and control the board, as well as combo with

to cheat out

for tons of damage.

is especially helpful in these regards, as it often costs zero.

is extremely powerful in that it can make the spells cost zero, making the combo more effective. This is a bit of a meme but is potent in the right hands, especially with Demon Hunter's cheap hero power that does 1 damage for 1 mana.