Wouldn’t recommend on your favorite world as he griefs! In this addon, Entity 303 will build random things in your world, blow things up and say things in the chat. There’s also an option in the resource pack to switch between his original and redesigned skins.
Not much will happen in daylight but during the night, Entity may say a few things like “MAKE A WISH” or other things like that. He would build random cobblestone that’s out of place and upside down crosses. He will also place down and light the tnt and blow up the area and he will sometimes show up roaming around. when you get close to him, similar to Herobrine, he will vanish but this time, He will have a small chance to leave tnt behind for the player. (Idea from Navneeth2007 on MCPEDL)