I might have just found the most rare drowned and the weirdest seed at the same time

i was making a server for me and my friends and i was wandering around near spawn and i had my hacked client on and i found 3 chest on top of eachother i went to spectator to see it clearly and i saw this.Also its the first time i have seen a drowned holding a trident and a Nautilus Sheell at the same time. Can anyone tell me how rare this is? also the seed is
3217291953720291001 for anyone who wanna see the chest for himself and the coords are -542 55 -542