These cards can be replaced with Hooked Scimitar, Arcane Wraith, Backstab. The replacement takes place from left to right (i.e., if the player replaced one card, he will receive Hooked Scimitar regardless of whether Eviscerate or Battle Hawkstrider was replaced).
The player's top twelve cards are arranged in the next order:
Cho'gall (sometimes spelled Cho'Gall) was a powerful ogre mage, Initiate of the Fifth Circle of the Shadow Council, and Chieftain of the Twilight's Hammer clan. Cho'gall managed to survive with remnants of his clan when Gul'dan was torn to shreds by demons during his quest to find the Eye of Sargeras toward the end of the Second War. Fleeing to Kalimdor and taking refuge within the ruined city of Ahn'Qiraj, Cho'gall's body became warped by the power of the Old GodC'Thun.
With the return of Deathwing and the Shattering that followed in his wake, Cho'gall aligned himself and the Twilight's Hammer with the corrupted Aspect and his allies, the powerful Elemental Lords Al'Akir and Ragnaros, to help usher in the end times. Overseeing the cult's efforts from his citadel in the Twilight Highlands, Cho'gall was struck down by champions of Azeroth within his own throne room.
Cho is the name of the ogre's two-eyed right head (shown on the left), while Gall is the name of the one-eyed left head (shown on the right). Each speaks with its own voice and indeed has its own personality, the two at times even clashing over the actions to be taken by their one, shared body. Cho is generally held to be the primary personality, with Gall's in-game quotes often displayed in parentheses following Cho's lines; Gall often responds to Cho's quotes rather than speaking for himself. While Cho's voice is deep and powerful, Gall's is higher-pitched and more maniacal.
In Heroes of the Storm Cho has control over the ogre's massive body, while Gall is powerless but to be carried wherever Cho goes. While Cho therefore controls the body's brutish strength, Gall commands the majority of the pair's warlock powers.