In this tale, Cú Chullain's power was contained in his middle finger. Wishing to defeat Finn, he came to Finn's house, but Finn disguised himself as a baby while his wife Oona baked cakes, some with griddle irons inside, some without. When Cú Chulainn could not bite through his cake (which had an iron in it) but the baby could (Finn's cake had no iron), in amazement Cú Chulainn felt to see how sharp the baby's teeth were, allowing Finn to bite his middle finger off and deprive Cú Chulainn of both his strength and size.