In traditional Beyond the Multiverse fashion, I'm assembling this deck with only UB cards (I'll be going over in-universe inclusions later on)
Nani gives you more flexibility than the higher cost Pluto Determined Defender since you wont have to rely on having another Pluto in play to get her onto the field, and effectively she does the same thing (Plutos healing ability is largely overrated and unlikely to make a huge difference in actual gameplay)
The Owl Island Location seems covered in trees too
For the cost of 5, those stats dont seem particularly impressive at first glance
----- Starfall Whenever The Lord Master of Hell attacks, it deals X damage to each opponent, where X is the number of noncreature, nonland cards in your graveyard
Three Arrows is a three-cost action that deals two damage to one character and another one damage to another