Sub-Zero utilizes an Ice Pollaxe alongside two smaller Ice Battle Axes during gameplay. He specifically uses the large Ice Pollaxe during his Fatal Blow, during his Fatality called Ice-Cutioner and during his Frostbite Outro while utilizing the smaller battle axes for a majority of gameplay. Unlike the Ice Battle Axes, the Ice Pollaxe can not be customized through the Kustomization.
Monk's Pollaxe in MKM:SZ
Shinnok's Bone Pollaxe in MKX.
Sub-Zero attacking with a large sized Ice Pollaxe after immobilizing Sonya Blade with two medium-sized ones during his Fatal Blow in MK11.