In Norse mythology, Heimdall is the guardian among the gods. He is not particularly brave, at least not as brave as his powerful brother Thor or his father, the all-knowing creator god Odin. But Heimdall has a gift: he sees everything, even his own eyebrows. That's why it is his job to be vigilant. Day and night, he sits watching on the roof of Valhalla while everything goes its regular course: every day the warriors train in battle, every evening their wounds are healed and they can carouse to ...