Syl'Vah (Reptilian voidling champion concept)

So I recently had an idea on a champion. I'm going to keep updating this as I go, there is currently no art for it, but this is my idea.

Passive: Consuming venom; Syl'Vah's spikes carry a venom that over time stacking with auto attacks or on taking attacks from melee damage, the enemy gainst a stack, stacking up to 5 times slowing, by 1.5%/stack scaling with level, and lowering attack damage by 2.5%/stack scaling with level.

Q: Seeping Spike. Seeoping spike Fires 1/5 of the spikes from Syl'Vahs back, regrowing over time scaling with AD at an 85% AD ration, and a bonus 5% armour pen. Scaling with ability level up to 110% AD and 20% Arm pen at max level.

W: Voidlings Veil: Cloakiing Syl'Vah for a short time ignoring collision he comes out of stealth with a vicious spin, striking with the spikes on his back adding 3 stacks of his Passive. W passive: Grants bonus damage equal to 5% of Armour pen for each stack of Consuming Venom.

WORK IN PROGRESS