The East Hebra Sky Crystal

Launch from the island where the shrine is located to the island to the northeast of it. Walk north on the island until Link is at the edge and then jump down using the paraglider. Search the cliffside for vines that can be cut or set on fire using an arrow with an attached fire element. If you miss the vines, the root scaling down from that island offers an ascending point but it can be difficult to activate the ascending point. Build a plane and attach the crystal to it to fly it back to the island where the shrine is located. Put the crystal through the shrine entrance to activate the crystal.