Breath of Siberys

any true dragonmark, Breath weapon,

Your breath weapon deals an extra 1d6 points of damage, or an extra 2d6 points of damage if you bear a Siberys dragonmark.

A breath weapon is available as a racial ability of the half-dragon (MM 146) and as a class feature of the dragon shaman (Player's Handbook II 11).

Your breath weapon deals an extra 1d6 points of damage, or an extra 2d6 points of damage if you bear a Siberys dragonmark.

Note

A breath weapon is available as a racial ability of the half-dragon (MM 146) and as a class feature of the dragon shaman (Player’s Handbook II 11).

Your breath weapon becomes even more deadly.