Shakti: In combat the reigar use an item called a shakti. This is a small (palm-sized) statuette that resembles a Figurine of Wondrous Power (an item rumored to have been first created by a reigar). Each shakti is designed by and for its user, rendering each one effectively a unique item. A shakti has three purposes, or forms.
First, there is its dormant form. In this state, it may be worn around the neck on a chain or cord, or hung from a kirtle or belt, or carried in a pouch or bag. Its shape is reminiscent of an animal or creature: a panther, a dragon, a phoenix, etc.
    On a command word known only to the creator/user, this form transmutes into a mode of transportation. The size increases to roughly eight feet long, and the shape changes to that of the creature depicted, lying prone. The reigar may sit or stand on the shakti in this form, and by mental command will it to move or stop. This form has a movement rate of 50 feet and an AC of 21 (+12 natural, -1 size) with base hardness 20 and 80 hit points (or more, see below).
    On a second command word (also, of course, known only to the creator/user), the shakti transforms into a suit of armor and an accompanying weapon. The armor is reminiscent of the animal represented by the shakti's dormant form, as is the special attack it bestows on its wearer. The armor is always made of a metal known only to the reigar. It is as hard as adamantite and lighter than mithral with a hardness of 20 (not including any magical protections put into it by the creator). More often than not, the chest plate is decorated with an embossed head of the animal depicted by the shakti's form.
    The weapon can be anything from a sword to a trident to a weighted net (use weapons tables from the Player's Handbook and Sword & Fist game accessory for ideas), and there is always a magical effect released in tandem with the attack. This may be merely for flash and effect, or it may relate to the damage caused. For example, a sword might emit a shower of colored light when swung at an opponent, but inflict no extra damage, or a net might paralyze a trapped victim.
    As mentioned previously, this armor also bestows a special attack on its wearer. If the creature depicted is a panther, for instance, the attack might be a magical rending, performed by making a slashing motion with the arms. If the armor represents a dragon, the attack could be a simulation of that dragon's breath weapon, activated by placing the wrists together with the palms facing outward.
    These details are left up to the DM to create; however, the DM should use the armor and weapon special abilities (see pages 180, 182, 185, and 188 of the Dungeon Master's Guide) as guidelines. The DM should disregard the maximum “equivalent +10 enhancement” bonus if the reigar's shakti would be appropriate.
    A third command word returns the shakti to its dormant form from either of the other forms.
    Reigar shaktis work only for their creators. Should anyone else gain possession of a shakti by way of theft (not likely) or spoils of battle (less likely), that shakti is inoperable. However, it is possible that a reigar might create a gift-shakti for an adventurer who does something very, very important for the reigar-like save his life, or provide transportation. This kind of gift-shakti, though, is far less powerful capable of making only one kind of transformation, no more than once per day: to vehicle, armor, or weapon (roll 1d6: 1-2 is vehicle, 3-4 is armor, 5-6 is weapon). Again, final say is up to the DM.

*Reigar armor offers a +8 armor bonus as full plate, weighs one-fifth as much as regular full plate, and is so fluid and form fitting as to be considered “light” armor. It also has 30-foot base speed, -20% chance for arcane spell failure (-35% when worn by reigar only), -0 armor check penalty, and +8 max. Dex bonus.

Sample Shakti

    Panther
    Vehicle   Armor and Weapon
AC   21   +10 armor bonus (hardness 23)*
Movement   50 ft.   N/A
Hit Points   83   83
Size   Large (Long)   Medium
Damage   N/A   2 claws 2d6+Str, rend for additional 4d6+Str x 1-1/2; Long Sword +3
 
    Phoenix
    Vehicle   Armor and Weapon
AC   21   +10 armor bonus (hardness 22)*
Movement   50 ft. flight (good)   N/A
Hit Points   82   82
Size   Large (Long)   Large
Damage   N/A   5d6 Fireball, 600-foot range (Ref save DC 14 for half); Mancatcher +2
 
    Dragon
    Vehicle   Armor and Weapon
AC   21   +10 armor bonus (hardness 25)*
Movement   50 ft. flight (good)   N/A
Hit Points   85   85
Size   Large(Long)   Large
Damage   N/A   6d4 acid spittle, 40 feet long (Ref save DC 13 for half); Warhammer +5

    Caster Level: 16th; Prerequisite: Craft Wondrous Item, Craft Magic Arms and Armor, Polymorph Any Object, Greater Magic Weapon, creator must be a reigar; Market Price: —; Weight: 1/10 pound inactive, or 10 pounds armor plus one-fifth standard weapon weight.


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Shakti, © 1990 Wizards of the Coast, Inc.
d20™ System, Conversion of Shakti ©2002, Ron Pollard
Original Source:The Shakti is covered in the description fo the Reigar in Monstrous Compendium #7.