The Moonstone Crown is a craftable post-Moon Lord rogue accessory that is a direct upgrade to the Feather Crown. While equipped it boosts the velocity of any thrown rogue weapon by 15%. In addition, all thrown rogue projectiles release a moon sigil while active for every two seconds, up to a maximum of five sigils at once. Sigils deal 45 typeless damage which can be affected by rogue damage bonuses, slightly home into enemies, and can pierce infinitely.
If the player utilizes a stealth strike and hits an enemy with this accessory equipped, three lunar flares will rain down onto the target. Lunar flares deal 85 typeless damage which can be affected by rogue damage bonuses. This effect only triggers for the first five enemies hit, and has a cooldown of one second.