An type of survival island seed, you spawn in one of two island far out in the sea. Especially two island quite the same in size and holds the same features, because this is an survival challenger seed then haven’t tree on the two island. But have patches of grass then we have chance potentially spawn some animal on this double island. I didn’t sure, but I am remember have one of two island have an entrance to the opening cave but first you need to destroy some block to enough create an entrance.
Seeds : courfei Work in PE ver0.10.0+ or ver0.10.5