Hamilton's biggest rival is passing the puck. Wait, you asked which team. Ok, it's probably Buffalo with Edmonton close 2nd. We played Edmonton quite a lot in the playoffs recently, twice in the finals and in the Western conference finals last season, or whatever you call that. Plus Keygan's first player was drafted by Hamilton and traded later, that was years ago and I wasn't around for that but I know there was some drama there. As for Buffalo, we are in the same division and it is objectively the strongest division in the league. I'm too lazy to check but I'm pretty sure for the last 10 seasons either Buffalo or Hamilton won the Great Lakes, we've also played each other in the playoffs literally every season. Ham vs Buf in the playoffs is so inevitable that Buffalo reverse swept Chicago last season while Hamilton barely avoided a reverse sweep by Edmonton. Would I be surprised if the challenge cup finals for the next 3 seasons is ham vs buf? I would be a little surprised, but that's fairly possible.