[WIP concept] Pesteplaga - The Plague Bringer (kit only)
#KIT
......................................... ........................................................................................................................ Passive The Plague Bringer Your basic attacks applies 1 stack of Rot Plague to your target. Increase your ability power by 5/7/9/11/13/15/17/19/21 for every enemy suffering from Rot Plague. When enemy affected by Rot Plague dies, then you permanently gain 0.5 ability power.
Rot Plague Deal 10/13/16/19/22/25/28/31/34 (+5% of AP) magic damage over 10 sec. Can stack up to 10 times. Enemies, suffering form this disease, lose 10% of their magic resist. ........................................................................................................................ .........................................
......................................... ........................................................................................................................ Q Toxic Breath Breath out a toxic spores in front of you, forming deadly cloud of spores for 4 sec. Enemies, who are in this cloud, lose 7/9/11/13/15% of their magic resist and get their movement speed reduced by 30/35/40/45/50%. In addition, enemies in this cloud gets infected by 1 stack of Rot Plague every sec.
If any enemy dies within this cloud, remaining cooldown of this ability will get reduced to 0.
Range: 200 Radius: 220 Cooldown: 12 sec Mana cost: 45/50/55/60/65 ........................................................................................................................ .........................................
......................................... ........................................................................................................................ W Toxic Delivery Charge at your target, apply Rot plague to your target and every enemy you touch while charging. In addition, inflect your target with special disease, dealing 80/110/140/170/200 (+50% of AP) magic damage over 3 sec. After this disease expires (or is removed), a Poison Nova will be released out of affected enemy. If you get touched by Poison Nova, then remaining cooldown of this ability will get reduced by 50%. You can move while casting this ability.
Casting time: 0.35 sec Range: 375 Cooldown: 14/13/12/11/10 sec Mana cost: 70/74/78/82/86
Poison Nova Infect the original target and all nearby enemies with 1 stack of Rot Plague. ........................................................................................................................ .........................................
......................................... ........................................................................................................................ E Rise Only to Fall Passive: after attacking for 7/6/5/4/3 times via basic attacks, your next basic attack will inflict 2 stacks of Rot Plague and deal 20/25/30/35/40 (+10% of AP) bonus magic damage.
Active: your next basic attacks gains 75 bonus attack range, deals 50/80/110/140/170 (+35% of AD) bonus physical damage and knocks your target into the air for 1.25 sec. If enemy lands into your Toxic Breath cloud, then he/she will lose 10% of his/her magic resist for 2.5 sec. This attack can't be critical.
Cooldown: 12 sec Mana cost: 50/56/62/68/74 ........................................................................................................................ .........................................
......................................... ........................................................................................................................ R System Failure Passive: increase maximum number of Rot Plague stacks you can apply by 1/3/5.
Active: target an enemy affected by your Rot Plague. Cause his/her immunity system to crash, dealing 20/30/40 (+10% of AP) magic damage over 6 sec for each stack of Rot Plague currently on your target. This damage penetrates all absorption and immunity effects, except death prevention mechanic. While casting this ability you dodge all basic attacks, AOE attacks, AOE spells and projectiles. You can move while casting this ability.
Casting time: 0.75 sec Range: 300 Cooldown: 60/55/50 sec Mana cost: 90 ........................................................................................................................ .........................................
Build example: 
