Anyone bit by that blade will go straight to Hell. Hell is where you will find Muramasa. 
- —Oracle of Arrako[src]
The Hellblade was an enchanted dagger. Anyone stabbed by the dagger will be banished to Hell.[1][2]
History
After he murdered Bracken and was sentence to the dungeons in The Tower of Broken Will, War gave the Hellblade to Solem hoping that he would kill himself with it and be banished to Hell.[1]
After being charged with finding the Muramasa Blade, Solem used the Hellblade to open a portal to Hell.[2]