That's how good series die. Not with a whimper, but with... Actually scrap that, I have no idea what I wanted to say here.
EDIT : and 2 years later, I get an awful reminder of why I don't remember much of the end of that serie.
Updated
Hmm...?Mmm...We only just finished knockin' those vengeful spirits' lights out, right?Ibaraki Kasen...I'm not being haunted by a ghost, am I?You're still close to Yuugi...!.... Nothing. It's just that recently, when I'm with you, I sense a presence.Aaah...DdmmdmmddmmmAs if.I won't forgive you, Ibaraki Kasennn!!Whassup?