Ostium: The Venom Lord
Ostium is a mage marksman that enhances all of his attacks with venom. He excels at dealing high damage to close enemies, and at controlling his domain. His body is comparable to Cassiopeia to an extent. His lower body is more of a snake's, oozing where he moves. His upper body is more of a wasp's. He has two antenna, which are dark green and leak of venom. He has 500 attack range, and a mana resource bar.
Level 1 Health: 460 Health regen: 9 Mana: 325 Mana Regen: 6 Attack Damage: 55.5 Attack Speed: .680 Movement Speed: 310
Passive: Lord of Venom This passive has 3 parts to it. The first part: Ostium leaves a trail of venom wherever he moves. This lasts 18 seconds. When he is on the trail, he gains 40-80 MS based on level. When a non-Ostium enemy is on the trail, they lose 10-30 MS. Ostium's attacks only deal 60% of AD damage. However, they also apply Deadly Venom (rename this cause Twitch). This venom stacks up to 4 times, and deals 2-20 (25% AD) (4%AP) bonus magic damage over 5 seconds. When auto attacking an enemy at 4 stacks, he unleashes a blast of venom at his target, consuming the debuff and 12-60 (125% AD) (32% AP) magic damage. This effect has a 20 second CD. Ostium takes 3-39 less damage from any single target spell that hits him (not auto attacks or damage over times), and 5% reduced damage from area of effect spells.
Q: Stinging Shot: 700 Range, Skill shot. 120/110/100/90/80 Mana. 10/9.5/9/8.5/8 second CD. Ostium blasts venom out in a line in front of him, dealing 30(20% AP) magic damage to enemies hit by it. Minions and small monsters take 3 times as much damage. When it comes into contact with a large monster or champion, it detonates after .5 seconds. It can be reactivated to detonate early. The explosion deals 45(30% AP) physical damage, and applies Stinging Venom. Stinging Venom deals 10 (10% AP) magic damage every second for up to 12 seconds, based on how far the shot traveled. Minimum duration is 4 seconds.
W: Corrosive Skin: Passive Enemies that damage Ostium are poisoned with Corrosive Venom, This venom causes enemies to take 70(25% AD)(5% AP) physical damage over 10 seconds, are slowed, and causes their non-ultimate cooldowns recharge at a 5% reduced rate for the duration.
E: Toxic Minion: 1200 Range, 3 Charges, 36-9 second recharge Ostium summons a minion at a target location that will act in 3 different ways: Summoned in lane: Follows other lane minions Summoned in jungle near Monsters: Will attack the monsters with Ostium, then follow Ostium. Summoned in jungle: Remains stationary, and attacks enemy champions that gain vision of it. Up to 2-6 Toxic Minions can be summoned. They last 120 seconds if they remain stationary, up to 30 seconds after attacking an enemy. If summoned to follow a lane or Ostium, they last 20-56 seconds based on level. Toxic Minions gain the effects of Lord of Venom, and only have 1 AD. They also gain the rank of Corrosive Skin. They gain AD and AP based on Ostium's bonus AD and AP. Passive: Toxic Wards. Wards placed last 10% longer, gain the rank of Corrosive Skin, and have bonus health. They also will attack when revealed, dealing 30% of Deadly Venom's damage.
R: Corrupting Venom: 600 Range, 40 second CD after the effect ends on a champion.
Instantly corrupt an enemy champion with Corrupting Venom who is affected by Deadly Venom, Stinging Venom, and Corrosive Venom. While corrupted, they are initially slowed for 90% of their movement speed, reduced to 10% over 1.5 seconds, and take 30 (20% AP) magic damage every 3 seconds. This effect lasts up to 30 seconds. If cast on an enemy below 20% of their maximum health, the damage is increased by 50%, and ticks 3 times faster. If the champion dies while effected by Corrupting Venom, the cooldown of Corrupting Venom is reduced by 40 seconds, and Ostium gains a movement speed boost of 10% for 15 seconds. This effect stacks up to 10 times.
I know the numbers could be off, but I wanted to whip this all together and just see what people thought about it. I don't expect much, just a cool concept.