The Dwarven goddess Berronar Truesilver created this shield as a gift for her consort, Moradin. She labored tirelessly to create ACER, pouring part of her own essence into the shield. Her intention was to protect Moradin in battle because she loved him. This devotion and love created an artifact of amazing power and grace. Although the shield is thought to be lost, some say that it merely waiting for a hero to claim it from its hiding place.
ACER weighs one-fourth as much as the same shield made from other metals. It is a concave disk 2.5 feet in diameter, weighing 12 pounds. The shield is made of Black Mithril, polished to a shimmering silver. When it is unslung, the user’s Armor class is increased by 2, and maximum Dexterity bonus is increased by 5, and armor check penalties are lessened by 4. When it is slung on the user’s back, it functions differently. All Saving Throw bonuses are increased by 4, Armor Class is increased by 4, and the wearer cannot be the victim of a Sneak Attack.
ACER is enchanted with a lesser globe of invulnerability that protects the user from harm. While being wielded as am unslung shield, an invisible, faintly shimmering magical sphere surrounds the user and excludes all spell effects of 3rd level or lower. The area or effect of any such spells does not include the area of the lesser globe of invulnerability. Such spells fail to affect any target located within the globe. Excluded effects include spell-like abilities and spells or spell-like effects from items. However, any type of spell can be cast through or out of the magical globe. Spells of 4th level and higher are not affected by the globe, nor are spells already in effect when the globe is cast. The globe can be brought down by a targeted dispel magic spell, but not by an area dispel magic. When the shield is slung on the user’s back, dropped, or otherwise not being readily used as a shield, the globe is deactivated and not in effect.
Lastly, ACER gets its name from its razor sharp edge. The concave disk acts as a +3 weapon and strikes for 3d6 damage. If it is used to strike a non-magical, inanimate object (chains, rope, weapons, etc.) it has a 75% chance of shearing through the material unless it is made of some Mithril alloy.