Well there is two different lvl were you cant meet him/them one being were he keeps jumping out at you at you do is when he jumps back run past him and later on there are two so watch out when you turn the corner and do the same as the last one and the other lvl is where on is in front of you and if you junp down on him you will have to fight him so instead go back and go west and up to the platform and it will create at bridge for you to jump over the elder drake. Fighting him would not be wise at this stage as he is very tough and will kill each party member with one hit so wait until you have leveled up alot before you try and save the game before hand plus when you reach floor 80-100 the elder drake will show up as a random battle plus all the bossess from the 20th, 40th, 60th and 80th floors will show up as random battles so good luck.