Whats the damage for dropping a 3,600lb tortle 30ft onto someone? [duplicate]

Dnd 5e. I’m a 450lb tortle that can cast enlarge on myself and become a 3,600lb large creature. A fellow party member can telekineticly move a willing large creature 30ft. Obviously we immediately did this to try and crush enemies and broke our DM. What’s a good damage/save for this tortle bomb?