(Champion Concept) Kar'Vek, The void parasite

Kar’Vek is a very passive playing mid laner, who specializes in spreading his infection through the minion waves, and shoving in wave. Later when they get their ultimate, then they can start havok, but only when they have the proper minion wave setup to do so. They will not be the best in team fights, but they aren’t supposed to, they’re supposed to put immense pressure on the lanes, and kill anything that gets in their way of doing so. The swarms spells only affect enemies who are infected, so you’ll need to spread your infection to be effective.

While I don’t really have a set idea of what the swarm will look like, imagine a parasitic monster that eats away at every tissue in your body that it can, and when there's nothing left, it emerges. I want this to be a very terrifying champion. Almost like a horror movie monster.

Passive: Insidious

Kar’Vek has an aura around it, any enemies that get inside this aura will be marked as infected, this mark will last for 20 seconds, and cannot be removed by any means. This mark will do damage over time as magic damage. Enemy champions do not take the damage. Ally minions can be infected too, but will not take damage.

Q: Airborne

Kar’Vek jumps to a marked enemy, staying inside of them. While inside an enemy, the parasite cannot use any of its abilities, but cannot be harmed while inside the host. While inside the host, the host will give off the passive aura. If the target Kar’Vek is inside of dies while they’re inside, the parasite will be left where the target died. This ability has a very short cooldown, so use this to spread your infection quickly among the enemy minion waves. Kar’Vek CAN jump to an enemy champ, but can only stay inside for 3 seconds, while they can stay indefinitely in champions and monsters.

W: Cell Growth

Kar’Vek Causes the infection in enemy units to rapidly spread and grow, doing aoe damage around every marked unit. Additionally, any unit that is caught in this aoe damage will be infected.

E: Barbed Union

Kar’Vek forces the infected cells to fuse together, creating a zone between all the infected units. Enemies inside this zone take damage from all infected units.

R: Dark Conception

Passive: Any unit that dies near Kar’Vek will leave behind a swarm, these things will fight along side of the parasite. (think a zzrot minion, but only for attacking minions) These things will attack freely, but will all focus on an enemy if Kar’Vek is inside of them with its Q ability.

Active (Kar’Vek has to be inside of an enemy champion with its Q ability): All infected minions die instantly, leaving behind a swarm. These swarms will follow Kar’Vek into the host’s body, and they begin to feast, doing 10%, plus an additional 5% for every swarm of the enemy champs maximum health as true damage. After this, Kar’Vek emerges as a fully grown creature.

When fully grown, Kar’Vek will have more health, and additional movement speed. Kar’Vek will stay like this until it is killed, where it will reset and have to get this form again. While they are fully grown, their Q will instantly do the same effect as the ultimate active with every available

This is my favorite concept I've come up with so far, i would love feedback or suggestions