If you are reading this could you please give me some tips on how to defeat my first hardmode boss i have gotten full adamnt armor but not like these awesome weapons lik idk a megashark etc.

i would really like to have help cuz at this part i'm stuc kat the game i did tho get a kill on the twins due to a spawning glitch whereon ly one of the eyes spawned and i made a harp

any hints? please put them down here