Unishard

The Unishard is a powerful relic that originates from the very early Multiverse. It powers the entire Reality Half, and creates new universes with its power. Those universes give energy back to the Unishard, repeating the cycle anew. If it were to crack, it would immediately stop creating universes, and all of the already existing ones would enter Heat Death all at once. This would stop giving the Unishard energy, and the Reality Half would fall apart and enter the Quantum Void.