| Spell type | Indirect poison attack (red spell) |
| Requires | Fumes of the Pit 10+ or Celestial Sigils |
| Alternatively | Terrestrial Sigils and Black Dragon Descendant |
| Casting time | 5/4/3/2/1 seconds per wave (including build-up) |
| Basic modifiers | 50 feet range, +10 Ascendancy, +5 Power (at rank 0) |
| Standard modifiers | 100 feet range, +20 Ascendancy, +10 Power (at rank 10) |
| Focused modifiers | 200 feet range, +30 Ascendancy, +15 Power (at rank 20) |
| Improved modifiers | 300 feet range, +40 Ascendancy, +20 Power (at rank 30) |
| Superior modifiers | 400 feet range, +50 Ascendancy, +25 Power (at rank 40) |
| Supreme modifiers | 500 feet range, +75 Ascendancy, +50 Power (at rank 50) |
Gas Wave is an indirect attack spell which has a 4 in 6 chance of hitting the body, a 1 in 6 chance of hitting the head and a 1 in 6 chance of hitting the face. This spell inflicts poison damage, and like all spell sigils can only be cast while in Dragon Form or Draconian Form.
The focused, improved, superior and supreme versions of this spell are unlocked at ranks 20, 30, 40 and 50 respectively.