Thor vs Cerberus

"RAAAAAAAAGGG!!!!!!!!!!!", Thor jumps to and swings his might hammer Mjölnir, shatter stalagmites in a in a wide arc around him. He stands up and jerks around as he tries to find his foe,Jörmungandr, but the mid-guard serpent was no where to be found. Thor calms down and examines his surroundings, the stagnant air that wafts from the nearby river and the spouts of flame tell escape any memory he has, this place ain't cold enough to be Hel and the river was a detail that seems to escape him. He notices a boat sailing away from him, the ferryman bearing a gaunt, almost skeletal form as he guides the boat up the river. Thor then notices the hallow souls of the dead as they march around him, not knowing anything about this place, Thor asks "hail, fellow traveler, where am I at?", the listless shade looks at him and says "you have entered the realm of Lord Hades, o'living one, turn back lest the hound Cerberus correct the problem of your still beating heart", Thor snorts and bellow out "ha!! the mighty Jörmungandr failed to lay me low, and you think some god I've never heard of and his pitiful little puppy can stand against me!! you must jest my friend!!", the man ignores Thor and continues his trek. Thor follows the souls, hoping this Hades fellow might have some answers as to why he is here and not face down in a river of poisonous blood. After a few hours of walking, Thor hears the loud and echoing roars of the guard dog Cerberus, the souls turn and plea with him "turn back, I could not forgive myself know I lead you to your...", the ground shatters as Cerberus leaps into the fray and roars at Thor. Thor looks on the beast, the main body was that of a huge mastiff the size of a tyrannosaurus rex, on its shoulders are two massive sets of bronze plates, the plate stack onto each other and form a neck that is tipped in a bronze mastiff skull with burning orbs of fire for eyes. The beast roars again as a massive snake whips over his back and crashes the thunder god, Thor head butt the snakes head, causing it to explode in a shower of splattered meat and bone as Cerberus reels from the pain.
Cerberus lunges for Thor, who seizes him by the throat and swings Mjölnir across, digging the head into the right skull, tearing it off and casting it into the river before he does the same with the left. Cerberus bucks and fights in the thunder god's grip, but Thor slams the butt of his hammer into Cerberus's eye socket, says "down boy" and jerks his arms, snapping the dog's neck before casting him into the river. Thor spits on the spot where Cerberus landed and walks into Hades realm, prepared to do the same to anyone else who would stand against him.
Analysis:
This fight was a beat down waiting to happen, Thor has fought several other giants, monsters and beasties before, so fighting was nothing new to him. Cerberus normally picks on mortals who try to enter the underworld, the one time he picked on someone his own size, Heracles, he was put down and Heracles was holding back because he was ordered to not kill the dog. Thor has many feats of strength that put him about even with Heracles , maybe a little more, and given that he has no reason to hold back on the dog: this was a glorified euthanasia.
next fight:
the supreme power of the Hindu universe is going to be tested by the supreme scourge of all creation: Vishnu vs Lucifer.
note: I don't like how this turned out, so you have an I owe you for any commission for free