Rare drop from hallowed and corrupt/crimson mimics
The rune will float midair when dropped, so it won't fall to the ground with the other loot.
You feel something is surrounding you
Your defence is increases by 4 and endurance increases by 5% but speed decreases
Also you have 5% chance to not take damage from enemy projectiles and hitting npc will give them midas debuff.
Material in Rune of Algiz