Cassiopiea Rework, The Poisoning Seductress.

Passive- Venomous Embrace: Cassiopeia's poisons generate a stack of Venomous Embrace, slowing the afflicted by X% for X seconds, stacking up to X times. At X stacks, all stacks of Venomous Embrace are consumed and the victim is stunned instead for 1 second and Twin Fangs' cool down is refreshed.

Q- Noxious Blast: ACTIVE: Cassiopeia hurls poison at the target area, which strikes after a short delay. Enemies within the area are poisoned, taking magic damage over X seconds. Cassiopeia gains 20% bonus movement speed for X seconds if Noxious Blast damages an enemy champion.

W- Miasma: ACTIVE: Cassiopeia throws a cloud of poison at target location which expands over X seconds, granting sight of the area and denying sight to enemies inside. Enemies in the area are poisoned, and take magic damage per second for X seconds. Continual exposure renews the poison.

E- Twin Fang: ACTIVE: Cassiopeia fires fangs at an enemy, dealing magic damage increased by their missing health. If Twin Fang kills its target, it refunds it's mana cost and generates a cloud of Miasma. (Large minions/monsters and champions generate a larger cloud of miasma)

R- Petrifying Gaze: ACTIVE: After a brief delay, Cassiopeia blasts all enemies in a cone in front of her with her gaze, dealing magic damage and slowing them by 60% for 2 seconds. Enemies facing her directly are stunned for the same duration instead.