An enormous dragon blocked their way out of the cave.
Advanced English Dictionary
+adjective extremely large Synonym: HUGE, IMMENSE an enormous house / dog + an enormous amount of time / money / information + enormous interest / pressure / responsibility + The problems facing the President are enormous.
Random quote: Without leaps of imagination, or dreaming, we lose the excitement of possibilities. Dreaming, after all, is a form of planning.: Gloria Steinem