Lask Frildur was a large male monitor lizard of the island Sampetra. His species was indigenous to the tropical isle but had been employed by Ublaz Mad Eyes, the pine marten emperor of the island, as his shock troops. Lask was the head Monitor General and Ublaz's strong right claw. He had pebbly grey-blue skin which turned green when he was ill. Like most monitors, he spoke in a sibilant voice that emphasized his "S"s and "Z"s.