The Green Child

If you cast "The Green Child"
onto the field when the Pucci and
Whitesnake cards are on the field,
(Or if they are all on the field at one time
in general, not depending on the order in
which they were set onto the field) ,
you will be able to
find C-MOON in your card inventory,
and move it to your hand.
If you already had C-MOON in your hand,
cast it onto the field.