Crystalice Staff
Crystalice Staff is a Pre-hardmode Staff which summons a baby ice prowler that fights for you by attacking enemies up close. This item is currently unobtainable.
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 Crystalice Staff has over a Ruthless one is knockback.