This is the worst boss fight in the entire game.
I have to spam the whetstone before attacking because otherwise it would take forever, plus he will not hurt me either because he is not programmed to, and his summons only ever add spikes, they do not do anything other than that.
Besides that, I wanted to make a Keg build, but I was really not lucky on the boss relics, so I dropped it eventually. I had a golden bow and a pig to make me rich, but no matter what I tried I could not find the spice relic which would have made this build pretty broken rather than underwhelming, therefore, they both bit the bullet before the Keg did.
At the very least it came in handy several times within endless whenever I was about to die.
