In Hades, you play as Zagreus, son to the god of the underworld. He wields six different Infernal Arms to break out of hell and reach the surface world.

Each Infernal Arm has 4 Aspects, or variant forms. The Stygian Blade's final form is the Aspect of Arthur which transforms it into Holy Excalibur.

Not only does Holy Excalibur add 50 to your Life total, but its Special Nova Smash leaves a Hallowed Ground aura that reduces damage, disables traps, and slows enemies and their projectiles.

So how do you get it?

Step 1: Unlock the Aspect of Guan Yu for Varatha, Eternal Spear

To do that, follow these steps:

• Purchase the Fated List of Minor Prophecies from the House Contractor
• Reach the final boss
• Invest 5 Titan Blood into non-Zagreus weapon Aspects
• Talk to Achilles

Spending 5 Titan Blood on the Stygian Blade should be easy. The Aspects of Nemesis and Poseidon are best here, as they overlap with the Aspect of Guan Yu unlock conditions.