Rune King Thor comes in wielding something few entities in any cosmos can claim: the runes of creation itself, the obliterating emptiness of the Well of Mimir, and a willpower that has stared down the end of all things without flinching. He does not swing Mjolnir carelessly — he channels runic Conceptual Destruction through it, reshaping the fabric of what Superman is allowed to be, hammering at the idea of the Man of Steel rather than merely the body. For a long stretch, it works as well as anything could. Magical energy saturates every attack, bypassing invulnerability on a level even Superman cannot simply absorb, and Thor's Cosmic Awareness lets him track every dimensional shift, every reality-anchored counter that Superman throws. He lands blow after blow that registers — genuinely registers — and he sustains it, his regeneration cycling the cost of each exchange back into readiness. This is Rune King Thor at full expression: methodical, cosmic, almost inevitable.
But Superman's Existential Anchoring means the conceptual strikes that would dissolve a lesser being simply do not accumulate the way Thor needs them to. Each rune-strike that should chip away at the foundation of Superman's existence instead meets something immovable — not because Superman counters it with a technique, but because he is constitutionally harder to put down at that level of reality. Meanwhile his own Conceptual Destruction scores against Thor at a rate Thor's regeneration is designed to handle — except regeneration, here, is working against a force that addresses what Thor fundamentally is rather than what his body can repair. The math is close. It is punishing on both sides. But close is not equal, and the edge in raw conceptual offense that Superman carries — a ten against Thor's eight on the defensive scale that matters most — means the accumulation runs slightly against Thor over time.
Thor does not buckle dramatically. He does not collapse. He is still standing, still reaching, still pushing runic power through a frame that has absorbed more than almost anything in existence could absorb. But the reserves that feed that are not infinite, and Superman's are proving deeper. The point where Thor needs another breath and Superman does not yet need one — that is the moment. Not a decisive blow. Not a killing strike. Just the quiet, terrible fact that Superman can keep going at this level and Thor, for the first time in an age, finds he cannot.
WINNER: Cosmic Armour Superman REASON: Superman's Existential Anchoring neutralises the cumulative toll of Thor's runic Conceptual Destruction while his own superior conceptual offense operates beyond what Thor's defenses can indefinitely sustain, leaving Superman with reserves intact when Thor's run dry.