Carl's sigil increases his damage against Claude because the system treats the amphibian as a lizard-class mob.
The system warns Carl that Claude Sludgington the Fourth counts as a lizard-class enemy for the Extinction Sigil, even though Eryops are amphibians rather than true lizards.
The classification grants Carl a twenty-percent damage bonus against the borough boss, matching the sigil's existing treatment of dinosaurs.
A system-applied combat mark that recognizes broad lizard-class targets.
The sigil supplies a favorable damage modifier during the boss fight.