It was made by combining a green charm with 128 spirit shards and a Water orb. This required 80 Summoning and gave no experience. The unfinished pouch could then be infused at a summoning obelisk to make the Hydra pouch, giving 140.8 Summoning experience. Any leftover uncharged pouches may still be converted in experience. Clicking one in your inventory prompts a warning message saying: "this item no longer has use. Convert it and claim the xp contained within?". Choosing 'Yes' will convert all pouches in your inventory into 140.8 summoning experience each.