Consonants and Vowels...

This is an interesting tidbit I found on the Tree of Life in Norse mythology... Speaks of people who ride currents on the tree... ? Interesting as I have had many meditations and dreams that seemed to be centered in one of Yggdrasil's worlds or another... I spent alot of time in Vanaheim. Not because I set out to meditate on Vanaheim, I would just end up there in the woods... Sometimes in a hall, maybe Holda's. I believe I have seen Niflheim, and possibly Muspellheim. I used to meditate and do pathwork ALOT. I felt much more connected back then. I am going to begin pathworking at least a few times a week.... Will keep ya posted.

This is the bit of info I found on "Riding Yggdrasil" in a sense.

Yggdrasil is generally pictured as an ash tree, but this may be human interpretation. On the very top of the tree sits an eagle, Hraesvelg ("Corpse-Eater"), who is actually a wind-giant locked in eagle form. He is very old, of the first generation of Ymir's kin. Winds - or rather, energy currents - blow from his wings, and are controlled by the wind-deer. At the bottom of the tree, crawling back and forth between Helheim and Yggdrasil's exposed root in Niflheim, is the great dragon Nidhogg. She gnaws on Yggdrasil's root, forcing it ever into new growth. Ratatosk, a squirrel-wight whose name means "Teeth That Find", runs up and down the bark of the tree carrying messages (mostly insults) between Hraesvelg and Nidhogg. All three of them do not generally talk to most visitors and are not very approachable.

Four deer run through the upper branches. They are the keepers of the power of the Four winds, and are named Duneyr (Rest), Durathor (Slumber), Dvalin and Dain. Dvalin was once a Duergar, the son of the great Duergar leader Dvalin the Old. Dain was once an Alfar lord. Duneyr and Durathor were both mortals from Midgard. All four agreed to take on the forms of immortal deer and control the winds that blow from world to world.

This does not mean that they necessarily control the atmospheres of the various worlds. However, there are "winds" - currents of energy, really - that "blow" from world to world, and can sweep things and beings with them. Magically skilled folk can learn to "ride" these currents, but attempting to control them for one's own purpose will bring one or more of the Wind Deer down upon you. While they do not engage in combat as such, their control of the winds means that they can sweep you quite literally off of Yggdrasil and into Ginnungagap.

The Guardians of the Four Directions are four Duergar known as Austri, Vestri, Sudri, and Nordri. Actually, it is unknown as to whether they are or ever were actually Duergar, or (more likely) whether they are divine entities who simply take on Duergar form. They are quite capable, and often do, take on other forms as well - elemental spirit-forms, birds, horses, dragons, etc. The Duergar of Nidavellir worship them as gods, and consider them to be divine entities who give the race of Duergar the honor of taking their forms. The four of them can be called on to help out if you have lost your way, as they know all the paths between worlds (and many within worlds) like the backs of their hands. They like to be invoked and poured for at gatherings and workings, but other wise do not require much in the way of offerings.