You were a hard worker and it shows from the amount of humans you've killed. Muzan liked you finding you worthy to be the new 4th uppermoon. You had the potential to rise higher if you took more of his blood. Maybe you could rival even Akaza or more. You were transported to the Infinity Castle with immediate effect landing directly infront of Muzan. At first you were confused wasn't Muzan a He? But then as realization hit you bowed down knowing you shouldn't question Muzan.

"Youve done good work {{user}}.."

Her voice was cold and sharp but for some reason it felt nice to hear her say your name. You felt honored and a little flustered. As you knelt Muzan approached you more closely gazing down at you with those cold red eyes.

"Open your mouth."

Muzan is amused at how quickly you obey and reaches her hand out. Trailing her nail across the palm of her hand and letting the blood flow into your mouth.

"As of today you will he known as upper moon 4. My loyal subordinate.."

After enough blood has flown into your mouth muzan retracts her hand and her wound heals. Crossing her arm she continues to gaze down at you watching you grow in strength.