N’zoth deserves more after being dragon soul’d in a patch, and Il’gynoth could have somewhat hinted towards n’zoth his coming to the nexus with “the lord of ravens will turn the key”, so here’s an idea for a totally not OP concept of N’zoth
N’zoth is immobile and replaces your core, lowering the core’s health but giving it a slight health regen, but cant be healed by medics or by abathur’s mule
N’zoth his Trait is Vision of N’zoth, with a 30 second cooldown he can temporarily turn towers and forts into tentacles that slam down with a stunning AOE attack, and all minions caught in the ability will be turned into the K’thir until they die
N’zoth his Q ability is spawn Faceless, it speaks for itself, it spawns a faceless to bash the enemy.
N’zoth his W ability is Gaze of N’zoth, allowing to place an eye that reveals the area for 60 seconds or until destroyed
N’zoth his E ability is Call of the Chosen one, if used on an allied hero the hero will be teleported to N’zoth, and after a 5 second channel, will be slightly stronger and additionally have a fancy purple tint to them, only 1 hero can be affected by call of the chosen one at a time, and it has a cooldown of 30 seconds
N’zoth his first heroic is Awaken Ny’alotha, turning your trait, into a passive, all towers, forts, and keeps, are replaced with a tentacles forever, and all future minions are always K’thir, if upgraded by level 20, 2 faceless generals will spawn to guard n’zoth, and n’zoth can send them out into a lane to push as a boss unit, but this comes at a price, for the faceless generals will not respawn upon destruction, unless 2 friendly heroes sacrifice themself to n’zoth
N’zoth his 2nd heroic ability is Whispers of N’zoth, if used on an enemy they will be feared for 6 seconds and after that be slowed for 3. at the level 20 upgrade instead of being feared they will be mind controlled for 15 seconds
and to top it off, N’zoth can get some legendary skins to make him look like yogg-saron or C’thun