Interesting. The attack doesn't say "Basic Water Energy". I think it should work.
Boost Energy Prism Star:
"This card provides Colorless Energy. While this card is attached to a Stage 2 Pokemon, it provides every type of Energy but provides only 1 Energy at a time. If you have 3 or more Stage 2...
If using Naganadel, the only hang up would be getting the Water Energy from your deck (after shuffling it into your deck) to the discard pile. Thoughts?
Aren't we getting a SR Full Art Brooklet Hill? Rotation pushed back.