The forest edge trembles as a herd emerges, their footfalls like distant thunder. At the front marches a massive ceratopsid, its wide frill adorned not with sharp horns, but with a rugged bony boss across its nose. The Pachyrhinosaurus lowers its head, scraping the earth with a hoofed toe, then lets out a deep bellow that echoes across the land. Around it, smaller herd members gather, protected by the sheer bulk and presence of their leader.