There is no Elder there

How do you get the power to wall climb then?

That elder is not in the Lost Cities
defeat Ineptune to continue to the next realm,
The Icy Wilderness, after Spyro gets captured, you have to play hunter to get through the
Gloomy Glacier and to the Ice Citadel, once playing as Spyro
Destroy the first dark gem you see, you will fall through the floor and eventually land
right in front of Elder Astor, who will teach you that ability. I hope this helps you.

~Victoria

not it say that the elder is in the depths somewhere

There is no need to go to the elders to get
abilites just do this cheat circle circle circle square when you pause and you get all
abilities . also i done a glitch i went to the swamp area and jumped on the cannon thing
then i fell in the swamp (I suppose to die)Then I landed in Red dragon level and fought
him .Lucky glitch dont know how!!!!