Complex sentence: The band has a notable mascot named "Chaly", a skeletal bat with a skull-like face, horns, bony wings and green eyes, who has appeared on most of their album covers.
Split into simpler sentences: The band has a notable mascot named "Chaly", a skeletal bat with a skull-like face, horns, bony wings and green eyes. Chaly has appeared on most of their album covers.