Minus scepter and shard upgrades, here are some mechanics (correct me if im wrong) that are present in game but are still not available as a purchasable item:
- Health freeze (AA ult)
- Shatter (AA ult, axe ult)
- Cast range reduction (bane enfeeble)
- Track/single target exposure (BH track, slardar ult)
- Free pathing/flying movement (WW aghs, DK aghs, brood 2nd)
- Untargetable (Willow 2nd, book of shadows)
- Fear (Willow ult, SF ult)
- Taunt (WW ult, LC ult, axe 1st)
- Unkillable (Dazzle 2nd, troll ult)
- Mana steal (Invoker EMP, Pugna ult, Lion 3rd)
- Mana restore manipulation (Necrophos 2nd)
- Shared damage (Warlock 1st)
- Shared spell/status (Grim ult, earth spirit ult)
- Tree walking (treant innate ability, hoodwink 3rd)
- Vision reduction/forced vision (hoodwink 2nd, bane 3rd)
- Sleep (Naga ult)
- Day/night manipulation (luna ult, NS ult)
- Barrier/path blocking (Shaker 1st, tusk 1st)
- Damage steal/drain (razor 2nd)
Obviously, some would be unbalanced should they become a purchasable item. Some may even render heroes obsolete of course. What mechanics would reasonably be added to the game as a purchasable item?
Source: https://www.reddit.com/r/DotA2/comments/z8xu3j/what_mechanic_that_is_already_in_dota_do_you_want/
