Daenen, the wolf was Fenrir/Fenris. (I think it was Tyr's hand, but I'm not sure)
On the Norse mythological side...
Garm, Hound of Hel
Creature--Hound Legend, 3/3
WWWW
2W, T: BURY target creature with power 4 or greater.
"He's the worst sort of monster."
*The Reprisal effect is to represent Garm's slaying of Tyr at Ragnarok*
Gnipahellir
Legendary Land
T: Add one colorless mana to your mana pool.
4, T, sacrifice all permanents you control, discard your hand: Bury all permanents.
2W, T, remove Gnipahellir from the game: Search your library for a card named Garm, Hound of Hel and put that creature into play under your control. Shuffle your library.
*Gnipahellir is whence Garm will be let loose at Ragnarok.*
Thor
Creature--Aesir Legend, 10/4
1RRWW
Thor comes into play tapped with 3 Mjollnir counters.
During your upkeep, you may sacrifice any number of Giants. If the total power of those creatures sacrificed is not 9 or greater, tap Thor.
Remove a Mjollnir counter from Thor: Regenerate target other Aesir.
*The sacrifice deal is to represent time spent killing giants, which is more or less what Thor does. The regeneration represents how Thor is ALWAYS saving the other Aesir's butts.*
Loki
Creature--Aesir Legend, 1/3
2B
B, T: Tap target creature.
BB, T, sacrifice a green permanent: Bury target Aesir with power 2 or less.
*The tapping is to represent Loki's trickster nature. The burial effect is to represent his killing of Baldr with mistletoe.*
Baldr
Creature--Aesir Legend, 1/3
WW
Baldr cannot be the target of spells or non-Aesir abilities.
0: Regenerate Baldr.
*Nothing could harm Baldr except Mistletoe.*
Tyr
Creature--Aesir Legend, 4/2
2WW
T: Deal 3 damage to target Hound Legend.
Whenever Tyr deals lethal damage to a Hound or Beast, remove that creature from the game and put a -1/-1 counter on Tyr. If at any time there are no permanents in play, return all creatures removed in this way to play.
*Tyr sacrificed his hand to bind Fenris, but Fenris was loosed at Ragnarok. Tyr killed Garm, but was killed in return.*