The following are known Action Replay Codes for Hexen on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

Infinite Blue Mana
8013db7d00cf

Infinite Green Mana
8013db7f00cf

Invincibility
8113db4cffff

Axe / Staff / Frost Shards
8013db7700ff

Hammer / Firestorm / Arc of Death
8013db7900ff

Quietus / Wraithverge / Blood
8013db7b00ff