To tame an Elderclaw, kill a wild adult to obtain an Elderclaw Seed from its inventory. Plant the seed in a Large Crop Plot with at least 300% greenhouse effect, irrigation, and fertilizer. As the seedling grows it will periodically request one of six resources: Sap, Giant Bee Honey, Black Pearls, Biotoxin, Ammonite Bile, or Leech Blood. You have 5 minutes to provide each resource or taming effectiveness drops. Once the seedling matures into a baby Elderclaw, raise and imprint it like any other baby creature.