It was the gargantuan skeleton dragon http://static3.paizo.com/image/content/PathfinderBattles/WZK71157-Fight.jpgI hope be filling it's base !
The skeleton Dragon don't have a base ?
That's true, don't appears be a Gargantuan Dragon.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.