SRD:Ring of the Ram
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Ram: The ring of the ram is an ornate ring forged of hard metal, usually iron or an iron alloy. It has the head of a ram as its device.
The wearer can command the ring to give forth a ramlike force, manifested by a vaguely discernible shape that resembles the head of a ram or a goat. This force strikes a single target, dealing 1d6 points of damage if 1 charge is expended, 2d6 points if 2 charges are used, or 3d6 points if 3 charges (the maximum) are used. Treat this as a ranged attack with a 50-foot maximum range and no penalties for distance.
The force of the blow is considerable, and those struck by the ring are subject to a bull rush if within 30 feet of the ring-wearer. (The ram has Strength 25 and is Large.) The ram gains a +1 bonus on the bull rush attempt if 2 charges are expended, or +2 if 3 charges are expended.
In addition to its attack mode, the ring of the ram also has the power to open doors as if it were a character with Strength 25. If 2 charges are expended, the effect is equivalent to a character with Strength 27. If 3 charges are expended, the effect is that of a character with Strength 29.
A newly created ring has 50 charges. When all the charges are expended, the ring becomes a nonmagical item.