Titan Hulk comes in swinging with everything he has — and for a time, it is genuinely terrifying. He grows into his full immensity, each footfall cracking the ground beneath him, and the shockwaves he drives through the air with open-handed slams are less like strikes and more like weather events. He absorbs the crackling Norse energy Thor hurls at him, drinks it down, and swells larger still, his roar rattling the sky. When his fists find Thor, they find him solidly — Rune King Thor is no ghost, and Hulk's raw S+ strength registers even through divine armour. He batters, he endures, he grows. That is his strategy, and for several brutal exchanges, it looks like enough.
Then the runes move. Not the crackling, projectile magic Thor might have thrown in a simpler fight — something quieter and more terrible. Rune King Thor reaches past Hulk's biology, past the gamma-fuelled fury and the anger-scaling that makes the Jade Giant so dangerous over time, and touches the conceptual thread that holds it all together. Hulk's regeneration does not slow — it simply stops being a thing that exists for him. His power does not drain — the principle of it is unmade at its source. The stamina that would have sustained him through a longer war begins to hollow out, because there is nothing underneath it anymore to pull from. Hulk swings again, and the swing is real, but it is the last full one.
What follows is not a second Hulk — it is the first one, diminishing. His size bleeds away not through injury but through the absence of whatever was sustaining it. He plants his feet, locks his jaw, tries to will his way through it the way he always has — but the will has nothing to feed on. Thor does not need to land a finishing blow. He simply holds the rune-work steady, watching Hulk's roar become something hoarser and smaller, until the Jade Giant drops to one knee and cannot explain why, and the fight ends not with a thunderclap but with a silence that Hulk cannot fill.
WINNER: Rune King Thor REASON: Rune King Thor's Conceptual Destruction bypasses Hulk's regeneration and anger-scaling at the foundational level, eliminating every mechanism by which Hulk could sustain or finish the fight.