I'm sorry, but I don't see why this has to be a new Power.
I'd make it Modular Abilities (with the 2 Refresh surcharge). Maybe a 1 Refresh rebate/Limitation for being limited to abilities appropriate to your environment, but since Modular Abilities already expects a limited list rather than "all powers ever", maybe not. Definitely a rebate if you have to spend time to "attune".
Then I'd make generic lists for terrain types, rather than having to make a new list for every single place in the world.
(EDIT: And now I see Taran just posted the same thing...)
Example ListsThese are made with powers from YS only. Add in custom powers to taste, I don't have time to go through the whole custom power list right now.
GENERAL (available anywhere)
Psychometry [-1]
Supernatural Sense [-1?] (Detect disruptions to the environment, whatever it is. Would detect a fire anywhere, logging in a forest, flooding in a city or dry land environment [but not a wetland]. Would not detect cutting down trees in a city or destruction of a house in an otherwise natural setting -- only things incongruous with the broader landscape. Assume something has to be at least a square mile to be "broader landscape", not every tiny park in a city. Range is about a mile or so for big disruptions like a forest fire, less for small things.)
URBAN
Channeling (Metal) [-2]
Echoes of the Beast (any urban animal, e.g. dog, housecat, rat, pigeon, cockroach...) [-1]
Inhuman/Supernatural Toughness [-2/-4] - draw upon the steel skeletons of buildings for immense resilience
Inhuman/Supernatural Speed [-2/-4] - draw upon the speed of cars
Spider Walk [-1]
DESERT
Breath Weapon [-2] (fire)
Echoes of the Beast (any desert animal) [-1]
Channeling (Fire) [-2]
Inhuman/Supernatural Speed [-2/-4]
Inhuman/Supernatural Toughness [-2/-4]
FOREST
Channeling (Wood) [-2]
Cloak of Shadows [-1]
Echoes of the Beast (any forest animal) [-1]
Inhuman/Supernatural Recovery [-2/-4]
Inhuman/Supernatural Toughness [-2/-4]
Spider Walk [-1]
WETLAND/AQUATIC*
Aquatic [-1]
Breath Weapon [-2] (acid)
Channeling (Water) [-2]
Inhuman/Supernatural Recovery [-2/-4] -- water finds its own level, flowing in to replace any that is removed
Inhuman/Supernatural Strength [-2/-4] -- strike with the power of waves/flowing water
*I would limit this to significant wetlands / bodies of water, not every tiny pond or stream.
I would say that adding in lists for Grassland/Savanna and perhaps Ice/Arctic/High Mountains would cover pretty much anyplace.