The Terriers won Game 5 on the road 3-1 on Sunday night.
Jeremy Leipsic and Layne Todor both contributed a pair of assists for the Terriers, Ty Barnstable, Mackenzie Dwyer and Ryan Hendrix all scored as well.
For OCN, Justin Nachbaur scored the lone Blizzard goal on the night.
Goaltending was the real story for Portage, as Kurtis Chapman made 40 saves on the night.
Game 6 will be Wednesday night at Stride Place in Portage.