The brave Beowulf bounced into the fiery lake, where Grendel's mother lived.
Beowulf swan for a day before he got to the bottom where the witch attacked him. They fought as monsters of the lake gathered all around to watch Beowulf struggle. She tried to kill him with her claws but was unsuccessful because of his armor.
The water witch whisked him away to her lair wishing she could cut through his chain mail some how. She gets him there and he finally start to fight back and reaches for his sword, he goes to stab her only to realize that his sword would not work on her, man-made tolls where not enough to fight this beast.
Beowulf throws the witch off of him and sees an amazing leek of battle, forged by giants.
Beowulf then leaps at the witch plunging the sword through her cutting her in half. Beowulf then finds Grendel's dead body and cuts his head off.
He then saw a heavenly light that lead him through the lake to land where he began his journey back to Hrothgar to give the head as a prize.