A Misc. Champ Idea
Hi Riot,
I've been designing random game mechanics and characters independently for years, unfortunately none have come to fruition. So I might as well give them to people that have the knowledge and time to make them instead.
Something that has been floating around in my head since I played Dementium back in 2011-2012 was the idea of a 'void room'. Basically, a small area of the map separate from the original, but accessed in real time. Much like how Kayn can traverse through walls, and Bard can create a fixed passageway, this ability would be a mix of the two. The champion would create a void gateway that both teams can use, allowing passage to the void; a different dimension on the rift which would grow bigger as the skill was leveled up, or through a collection mechanic. This other dimension could have special effects on allied and enemy champions, depending on champion specific itemization (like Viktor's staff upgrades), or just a fixed set of team A is healed, team B is damaged while inside.
The area of this void would be restricted, with only two ways to exit: the portal which was used to come in, or the portal used to come out (this portal would be created by reactiving the skill inside the void).
As an ultimate ability, the champion would tear a rift in the normal dimension, exposing it to the void - in turn forcing all nearby champions to undergo their respective effects for a short time. This void area would not be restricted, but could share the size of the separated void, and effects/bonuses would be halved.
In case you couldn't get a visual of what the 'void room' would be, I'll post a picture of it in a little bit.