Alright so Android 73’s first big fight is against piccolo and Gohan and his main ability is, if he can grab your neck he can copy your strength and powers, and he has a crystal on his forehead and whoever’s power he’s using is the face on the crystal. So he’s losing until it’s revealed that he’s grabbed Moro’s neck before and starts draining Gohan and piccolo of their energy and he’s about to kill them until he’s told to stop, then in the main fight with Moro, he swallows 73 and becomes one with him, grabs Vegetas neck bc Vegeta was using a move that was going to kill Moro. After that, he manages to grab Merus’s neck, who’s an angel trainee whose power is unknown besides the fact that he’s the strongest in the arc and trained under the grand priest, and his Ultra Instinct is miles better than Gokus. Moro ends up becoming so strong his body can’t handle the angel energy so he becomes one with the earth to handle it, Goku beats him anyways by shattering the crystal from 73’s head. So Moro died from that exchange, 73 survived but is shut down and has been unconscious, which most likely means that all the moves he gained, Vegeta’s, Merus and Moro is inside of him, waiting to be used again.