A new patch will hit us soon which includes the addition of Terroblade as a playable hero as well as Random Ability Draft where "each player is randomly assigned a hero, and each hero's abilities are placed into a pool. Players then take turns choosing abilities".
Terrorblade's list of spells
New patch
The update will be called 6.80 and welcomes a number of changes to almost every single hero. The highly disputed Earth Spirit was the recipient of a large number of changes. Some items also received some big changes, Blink Dagger no longer has a mana cost, Shadow Amulet may now be cast on allies and smoke of Deceit now lasts only 35 seconds instead of 40.
Source : Here