Daemonic Bile

Any Corrupted Titan may be upgraded with the Daemonic Bile mutation for +15 points. Once per round, during the Combat phase, a Titan with this mutation can spew Daemonic Bile. Daemonic Bile counts as an additional weapon and follows the rules for attacking as normal (see page 33 of the Adeptus Titanicus rulebook). 
Daemonic Bile has a Short Range of T, Long Range of -, Dice value of D3, S5 and the Firestorm and Fusion traits. 
This mutation cannot be used if the Titan has suffered Critical Damage to its head. Daemonic Bile is unaffected by Titan Legion rules (such as the Legio Infernus’ Masters of Flame trait), Maniple rules (such as the Ignus Light Maniple) and cannot be upgraded with Wargear (such as the Legio Infernus’ Clinging Phosphex).