champion concept
I'm still missing ranges, cool downs and costs because I just wanted to get the idea up and see what people thought. Help deciding on them and maybe a clever cost mechanism would be cool. I think that he might use something similar to energy because being a composition of insects he would have to replenish the ranks.
Swarm, the hive mind.
(Lore)
Several years ago, a strong magic swept the land, the void was opened. We came through, though we didn't have,a body to call our own like so many of our brothers. We we're just souls weak, separated. We found homes in these mindless insects and joined together, to seek out the origin of this magic which called us here. We found ourselves
here at the league of legends, and we will take this power for our own and kill all who stand in our way.

(Info)
Mage, Ranged

Statistics
Health 475 (+60) Attack Damage 45 (+2.5)
Health regen 6 (+0.5) Attack speed 0.7 (+1.8%)
Mana 275 (+65) Armor 40 (+3.2)
Mana regen. 7.5 (+0.5) Magic Res. 25 (+1.5)
Range 500 Move speed 340

(Ability Detail)
-Passive-
Ever shifting form
Every 8th spell or attack that targets Swarm misses.

-Locusts-
Swarm send forth an army of locusts to devour his opponent dealing damage over time and initial damage on hit.
On hit (50/70/90/110/130) (+.2 ap)
Over time (40/70/100/130/160) (+.5 ap)

-Fleas-
Swarm infests an area of the map with fleas, dealing damage and agitating the enemy causing attacks to miss.
Damage to enemies in the area (90/145/195/255/310) (+0.8 per ability power)

-Bees-
Swarm surrounds enemy with bees dealing massive damage over time.
Magic Damage: 85 / 130 / 175 / 225 / 275 (+1.0 per ability power)

-Ultimate-
I don't know yet really I'm thinking something along the lines of him growing in size and dealing damage to all
near by enemies something to the equivalent of anivias ult, having a high mana cost per second and having the
ability to be shut down by being targeted by auto attacks and spells. with a lengthy cool down.

seems pretty legit