The Lunar Crystal Staff was a post-Moon Lordsummon weapon. Upon use, it summoned a friendly Lunar Crystal minion. The summoned crystal would attempt to charge enemies, similar to that of the Deadly Sphere minion.
Its best modifier was Ruthless. The Mythical modifier provided the widest array of stats bonuses, but these primarily affected the initial summon rather than the resulting minion. Additionally, Minions cannot deal Critical hits. The only significant advantage a Mythical Lunar Crystal Staff had over a Ruthless one is knockback.