Champion Concept: Lochlan - The Gatekeeper
So pretty much, this champion is the gatekeeper between worlds. He governs any and all that pass between realms (Runeterra, Void, etc.) His weapon of choice is a large skeleton key the endows him with the power to open the gates to other worlds. He is an AP champion that could probably either play jungle or mid.
Abilities (I guess I didn't think about it too much)
Q: Spacial Rift: After casting your W, and once you have 2 Spacial Distortions down, you can use your Q to connect them, which creates a rip in the fabric of reality lasting for a few seconds. If a champion is standing between the distortions when they are connected, they are stunned.
W: Spacial Quake: When you use your W, a mini black hole forms, slowing anything standing too close. At first, you can have two out at a time, but once maxed out, you can have up to 4. They also stack, similar to smite, but you cannot place more than 1 in quick succession.
E: Spacial Distortion: Lochlan alters the reality surrounding his key, increasing his range slightyly, and also applying extra ability power damage on it. This ability can remain active, but at the cost of mana after each auto attack.
R: The Gate: Lochlan puts the key into a keyhole that appears, causing 2 large swinging doors to appear. They quickly open, releasing a ray of light, which causes a black hole effect. All enemy champions and minions (including neutral) are slowly pulled towards the gate.
Didn't really go in to too much detail regarding cooldowns, cast times, damage, etc. It was just a concept that sounded pretty cool.