The largest of Thanos's children, with a chain hammer, and no lines.
Cull Obsidian is an adopted son of Thanos, equipped with a chain hammer and an arm blade, voiced and motion captured by Terry Notary. In 2018 he and Ebony Maw come to Earth for the Time Stone and are met in New York by Stephen Strange, Wong, Tony Stark and then Peter Parker.
Wong tricks him into stepping through a portal that opens into Antarctica, which is the single funniest thing anyone does in that film.