Most attacks vs 1 target in 1 turn: 22? Can anyone do better?

[MaxWilson]

Oh lol, I had thought you meant to simply bite your head off in some way without dealing more than 25 damage to yourself. (What even are the rules on attacking yourself?)

And yes, this whole challenge is silly, but several of these don't actually require extraordinary build resources (neither does this really) or massive amount of time spent as basically an npc.

I think the hydra thing requires few build resources (True Polymorph, and if you want to use it in actual play you also want a good source of healing like Extended Aura of Vitality). I'm not seeing that "massive amounts of time spent" either unless you're trying to get ten of thousands of heads, which why would you?