Thorgal - Volume 31 - Neokora

Thorgal, Jolan, Wolfcub and the two children they rescued from the
Selkie are sailing home when they come across a drifting ship. The
crew is dead, but a strange, obviously magical creature appears
suddenly and attacks. That is merely the first in a series of bizarre
events that will force Thorgal to return to a place with strong ties
to his own past, as much to protect his family as to prevent terrible
weapons from falling into the wrong hands …