By the time that Su and Walker had made their way back with a small number of water and sky wyverns, they were both somewhat exhausted.
Between having to scour each island to ensure that every single wyvern had been brought along, including one troublesome hatchling who tried to hide, and gathering materials to bring back, they had become very run down.
The number of materials haad started off small, but the more that either of them thought about it, the more that they both understood that they would have to make more tips if they did not gather a large amount now.
Since they would need more of the unique crystals, Walker had spent a lot of time under the water gathering the broken pieces which had long fallen from the cliff side of the islands. That way he did not damage the islands any more than the way nature had already done to them.
