Cloudkill

Cloudkill
Magic Resistance: No
Legendary Eldritch Spell [Magical, Perceptive, Poison]
Prerequisites: Eldritch Rank 7
Disciplines: Conjuration
Potency: [1d12 + Eldritch Rank]
Cast Action [CT 5, REC 3]
Components: V, S
Cost: 4 Stamina and 2 Stamina Burn
Duration: 1 Round or until dismissed, dispelled or disrupted.
Upkeep: Free action, spend 3 Stamina to increase the duration by 1 Round.
Range: 200 ft.
Area: 20ft high, 40ft diameter cloud within range
Effect P: You create a cloud of sickly green, extremely noxious gas that slowly engulfs your enemies, instantly killing the weak and gravely harming the strong. Every round, the cloud automatically moves away from you at a rate of 10 ft per round, sinking or rising to stay level with the ground. All creatures that come into contact with the cloud risk a deadly poison (even if holding their breath). Whenever a creature comes in contact or remains within the cloud make an attack (maximum once per round, per creature):
Target: The creature in contact with the cloud.
Attack: Arcana vs. Fortitude
Hit: The target suffers Necrotic damage equal to its Healing Value or 30 points, whichever is greater.
Miss: Half Damage.
Special: If the target is reduced to 0 hitpoints while within the cloud (or enters the cloud while at 0 hitpoints) it is Marked for Death [SE, ST 5d10 vs CON]. If the target does not save within 20 segments, the target dies. Targets cannot save from the Marked for Death effect while they are within the cloud.
Augment, Spreading Death
[Eldritch Rank 8, Stacking]
Stacking [Rank 8, 9, 10, etc.]: This augment may be applied multiple times and is limited by your Eldritch Rank.
Cost: 1 Stamina
Effect: Increase the diameter of the cloud by 10 ft.
Master Augment, Venom
[Eldritch Rank 8, Stacking]
Stacking [Rank 8, 9, 10, etc.]: This augment may be applied multiple times and is limited by your Eldritch Rank.
Effect: The minimum damage dealt by the Cloudkill increases by 10 hitpoints. (i.e. it raises to 40 instead of 30, then 50, etc).
Master Augment, Corrosive Admixture
[Eldritch Rank 9, Caustic]
Cost: 1 Stamina
Effect: Any damage dealt by this spell is now Caustic and Poison damage. This spell gains the Caustic keyword.