Astral Bulwark

The Astral Bulwark is an Hardmode, Expert Mode-exclusive accessory obtained from the Treasure Bag dropped by Astrum Deus, which causes five stars to drop from the sky when the player is hit. It also grants immunity from the Astral Infection debuff, which is inflicted by enemies in the Astral Infection biome.

The Astral Bulwark also has a rare item variant called the Hide of Astrum Deus, which is dropped by Astrum Deus.