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The Second Fight

Beat the Tyr Spirit Sword (True) and get the Tyr Sword in the Swordgrave. Then talk with Gramr Spirit Sword.
 

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Introduction

Odin created the Tyr Sword and the Gramr Sword to balance each other. Though the seal has been broken on the Tyr Sword, the Gramr Sword can still help. It will control the Evil spirits summoned by the Tyr Sword do that it cannot draw upon their energies. This is your chance to defeat the Tyr Sword Spirit!

NPC Dialog

Human, the Tyr Sword is so powerful here because
it is fed by all the evil spirits of the Seven Deadly
Sins. Their power is inexhaustible here. I will use
my power to control them briefly, but you must
defeat the Tyr Sword Spirit while I keep them in
check. If we fail here, no one but Hades or Odin
himself could control the Tyr Sword.

Quest Completion

This is the moment that we were created for. Odin
created us with our own desire and will, and we are
destined to battle each other. The Tyr Sword can
draw upon evil spirits, which are abundant in the
netherworld. Hades sealed it to keep the power in
check, but that couldn't hold it forever, even if you
had not foolishly unsealed it here. We will defeat it
now and stop its threat forever!