>>14411541Combine bombs with gel for sticky bombs, or else they will roll off their original spot if they aren't imprisoned between blocks, also now a grappling hook could be useful to hang on the ceiling while dropping bombs
You need to destroy the purple orbs in the corruption biome, three will spawn the boss, each orb will drop something, if you are lucky you get weapon with a good modifier. If you lose to the boss, you can either destroy more orbs or summon it with a crafted item. If you lost to the boss, but got somewhat far, you should have some material from its segments, this should be enough to craft more powerful weapon yourself.