 Following their advice, Haakon has a wooden man (Old Norse "trémaðr") built out of driftwood and endows it with a human heart.Haakon and the two sisters then bring the "trémaðr" to life, arm him with a halberd, and send him to Iceland to kill Þorleifr, which he does.A number of theories surround the figures of Þorgerðr and Irpa