I don’t think I can take The Phantom of the Opera seriously anymore because when Raul appears all I see is this:
And when I see Erik there’s this…
'The tree on his chest is meant to be Yggdrasil, the World Tree that ties all Nine Realms together. Since Heimdall is the watcher of these realms, the amber jewel on his chest is the same colour as his eyes. Heimdall sees all!'
- The Art of Thor: The Dark World