They do, with much effort take down the Stasis Vault, releasing both hoard and dragon. However, 5 rounds (and 200 hps of unavoidable last-moments-of-life-damage later, The Great One has put itself back in stasis - but not the Hoard, the matrix of high-epic magic items that anchor it were tampered with).
So the walk off, or, actually, transport via multiple trips walking a portable hole through a teleport circle, with a dragon horde. A little over a hundred tons of it, nearly the cargo capacity of their ship, after replacing their ballast with it, as well!
That 'we made off with a Dragon's Hoard without having to fight the Dragon because we were just too clever by half' bit, that's CaW. (Really, the plan to kill it like that was CaW, but even CaW plans don't survive contact with a high-Epic caster.)
CaW is, of course, completely unsupported by 4e.