Buddha is pretty resilient even after a fatal stab in the stomach, so I'm unsure if Poseidon can outlast him. But, ok, we cannot rate Poseidon's durability obviously since Kojiro didn't want to take unneeded risks once he got Poseidon dead to rights.
Not that I don't believe Hajun can't be impaled over and over, but if Hajun repeats the same tactic he did to Salakayas (letting the trident get stuck in him, basically), then Poseidon will die a horrible death.
Not that I don't believe Hajun can't be impaled over and over, but if Hajun repeats the same tactic he did to Salakayas (letting the trident get stuck in him, basically), then Poseidon will die a horrible death.