Hearthpwn

Wee Spellstopper: Play this usually after Troggzor dies to a spell, the burly trogg is now a Faerie Dragon! (Vulnerability: Cabal Shadow Priest)

Troggzor (Hope that they cast SW Death or Mind Control but hope you have a Polymorph "ready-in-hand")

Dr. Boom (Currently Top-3 Deck Staples)

Edit (Video of Secrets controlling Handlock, inconsistent but variably strong)

Mountain Giants are to bait out BGH's and enemy spells

(edit: Molten Giants (As a comeback mechanic)

Kezan Mystic (A Chance, just like 1 Acidic Swamp Ooze or Harrison Jones for weapons, to steal back a Secret that has been Thoughtstolen)

Harrison might be a good choice in this deck instead of Kezan Mystic or Loatheb if you're not afraid of direct spells on some specific turn

Flame Cannon acts like a Bomb Lobber, try to kill the other creature before you use this.

Echo of Medivh is nice for any of the Giants or after Unstable Portal benefits if they live that long

 Note: Ice Barrier / Ice Block, problem with Ice Block is that Zoo runs you down but Ice Barrier stalls early enough to make you feel safer... this deck is more like a semi-Secrets Mage :) You dont want your opponent steal your Ice Block in case you dont draw Kezan Mystic to steal it back :) -justsaying