Corrosive Haze (T4)

Level12

A 5-foot cloud of acid-resistant nanites continually converts nearby water vapor into deadly acid. You can create the cloud in the same square as a creature and move it up to 30 feet in any direction as a move action on your turn. If the cloud enters (or is created in) a square containing a creature, it can’t move any farther that round and deals @[4d6 acid damage][roll 4d6 as damage for 'Corrosive Haze'] to that creature (Reflex negates). The acidic cloud also corrodes any unattended objects along its path, dealing them @[4d8 acid damage][roll 4d8 as damage for 'Corrosive Haze'].

If you don’t move the cloud, it remains where it is; if it shares its square with any creature at the beginning of your turn, that creature must succeed at a Reflex save or take @[4d8 acid damage][roll 4d8 as damage for 'Corrosive Haze']. Any creature that takes damage from the cloud takes 10 additional acid damage at the end of its next turn.