I just fought with a bard who somehow managed to distort my undead. I thought that was not possible, considering the nature of the the unliving.

Is this a bug, or by design?

Your infernal power EVISCERATES a young storm!
You try to attack some empty air near a young storm.
A flesh golem's smash MUTILATES a young storm!
A zombie of a war-weary storm giant tries to attack some empty air near a young storm.
A zombie of a war-weary storm giant tries to attack some empty air near a young storm.
A zombie of a war-weary storm giant's punch devastates a young storm!
A zombie of a war-weary storm giant's punch maims a young storm!
A zombie of a war-weary storm giant tries to attack some empty air near a young storm.
A ghoul's claw maims a young storm!
A zombie of a war-weary storm giant tries to attack some empty air near a young storm.
A zombie of a war-weary storm giant tries to attack some empty air near a young storm.
A zombie of a war-weary storm giant's punch devastates a young storm!
A young storm is DEAD!!
You receive 0 experience points.
A young storm's leg is sliced from his dead body.