The rarest of all delicatas:
Dyckia celicata var. golden or the golden form.
It is the smallest of all members of the delicata complex.
I have one only! It leaves on the top of the facing north wall where delicata type lives.
It is literally impossible to get there, we normal mortals. A very skilled climber and a daring soul
is required, a brave and courageous one.