Secret

Secret is one type of special spell card which can be activated during opponent turn. Therefore, when a secret is played, it can prevent opponent to gain fully control on his particular turn.

So far there are only 3 hero have the access of secret cards with different cost.

Mage: 7 types of secret which cause 3 mana

Hunter: 5 types of secret which cause 2 mana

Paladin: 5 types of secret which cause 1 mana

Secret sometimes play an turn table role when opponent start to guess your secret and accidentally lose his tempo or play the card inefficiently. Therefore secret poses psychology pressure and uncertainty to your opponent.

However, the scary of secret does not lie on the secret card itsef, but on the supplement cards of the secret. The supplement cards of secret give huge advantages such as tempo, man efficiency and board control to the player.

For example, mad scientist a 2/2 minion with cost 2 but a powerful deathrattle to play a random secret from your deck. Normally with cost 2, you can only play a minion with 2/3. but with mad scientist, you extra play a secret card which cost 3 mana for mage and 2 mana for hunter. You have gained 3/2 mana advantages.

Besides, mage has 2 more secret supplement cards which are Kirin Tor Mage and Ethereal Arcanist. Hunter has a Eaglehorn Bow.