The Living Tribunal was created by Stan Lee and Marie Severin for the "Strange Tales" series in July of 1967 as the guardian of the Marvel multiverse. Donning gold skin and a levitating head, with three distinct faces — one for equity, another for necessity, and the third for revenge — the Living Tribunal was tasked with keeping every universe in harmony and ensuring a single timeline didn't overtake any others. This was an especially tall order given that there's only one Living Tribunal throughout the cosmos with no actual variants.
When it comes to the Living Tribunal's power level, as the living embodiment of the Marvel multiverse, it is classified as an omnipotent being. It's immeasurably strong, durable, and even managed to render the Infinity Stones useless. Not to mention, should all three faces agree to do so, it has the ability to obliterate entire planets, destabilize stars, and wipe out populations. By taking such drastic measures to maintain multiversal equilibrium, the Living Tribunal is neither a hero nor a villain but simply a constant that all others must adhere to.
Despite all of that, the Living Tribunal is not invincible. It met its demise at the hands of a dangerous alien race known as the Beyonders in the eighth issue of "New Avengers" Volume 3, with Tony Stark and Uatu the Watcher discovering its corpse on the Moon. This eventually led to Adam Warlock taking on the mantle, becoming the Living Tribunal's official replacement as the new overseer of the multiverse.
Few beings can contend with the seemingly limitless power of the Living Tribunal. He may not be the most well-known Marvel character, but he's clearly one of the most important.
