Toothgnasher is one of the two magical goats that drew the chariot of a young Thor.
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History
Thor left Toothgnasher in charge of guarding a Mjolnir from another dimension (Earth-1610) after it caused his best friend Volstagg to become a murderous maniac. After Volstagg regained the hammer, Toothgnasher ambushed him in the old City of Asgard in the Asgard-realm in order to make Volstagg relinquish the hammer. However, Toothgnasher was unexpectedly grabbed by the monster Mangog and brutally decapitated.
Following the War of the Realms, Loki used magic to resurrect Toothgnasher as a gift to Thor, who had been given the crown of Asgard by Odin.