Hearthpwn

One of my favourite f2p decks to play.

How to play?

Go face as much as you can.
Make efficient trades, always check your luck with Arcane Missiles or draw before acting, this a super aggresive deck with limited damage, so against certain classes you're on a clock of losing, go further than T7 and your chances will drastically decrease.

Some matchups just cannot be won by being aggresive, for example, warlock with early taunts/removal or druid with early tokens, in this case you should just stall the game and survive until you get all the exodia pieces (2 fireballs, 1 frost bolt, 2 ice lances + apprentices).

Save your Sorcerer's Apprentice s, and don't overextend the value of mana cyclone.
Don't trade if you don't need to, always check possible heals, sometimes a big taunt means you will never be able to attack with minions again, in this case change the mindset.

If you are able to mill an opponent that requires early clean DO IT, Research Project and Coldlight Oracle can literally put them in the garbage bin by filling them with expensive cards that aren't playable or have no inmediate impact.

This deck is missing one Mana Cyclone, but its good enough with one.
Reckless Rocketeer is budget Leeroy Jenkins.
Pyroblast is nice too as it adds another wincon, just avoid a bad mulligan (one dead card will really hurt you with this deck).

One Ice Block is obligatory as it gives you a guaranteed way to make a two turn lethal.