Silent Observer Staff

The Despair Observer Staff is a post-Moon Lord summon weapon that is dropped by Silent Observers. It spawns a Silent Observer to fire nightmare runes at your enemies. Like other minions, summoned Despair Observers are invincible and follow the player for an unlimited amount of time, unless the player dies, summons a replacement minion, or cancels the buff.

Its best modifier is Ruthless. The Mythical modifier provides the widest array of stats bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, Minions cannot deal critical hits. The only significant advantage a Mythical Silent Observer Staff has over a Ruthless one is knockback.