Personal Truename Backlash

(Tome of Magic, page 229, DnD 3.5)

[General]

Your personal truename is so charged with magic power that those who fail to speak it properly are warped by reality run amok.

Prerequisite

Obscure Personal Truename, 15 Hit Dice

Benefit

Whenever a creature fails by 5 points or more in an attempt to speak your personal truename, it immediately takes ld6 points of damage for every Hit Die you have.

Normal

The consequence for failing a Truespeak check to say someone's personal truename is that the utterance, truename spell, or other ability fails as well.