Shell of Protection (Magic Egg)

This item, which appears to be a silver chicken's egg, was created by Magius of the Red Robes during the Second Dragon War and given to one of the war's heroes because of a stricture preventing wizards from using weapons of war. Thus, it was not with him when he was captured by the Dark Queen, a captivity Magius did not survive. Since that time, the shell has passed through the hands of many an adventurer and nobleman.
To operate this steel-hard egg device, one places it on a level surface and spins it on its wide end. From the egg's surface, a translucent shell of light springs forth in all directions to form a shimmering egg-shaped shell of protection 10-foot in diameter and 15-foot high (although 5 vertical feet are under the surface the egg is spinning on, making the visible portion of the shell cone shaped). The device grants fall protection from normal missiles within its boundaries. Additionally, any creatures that attempt to enter its field are usually turned aside without injury, in a random direction that does not allow for penetration of the field. The percent chance of making it through the field equals the creature's Hit Dice multiplied by five, with bonus hit points added as percentage points. For example, a wyvern of 7+7HD has a (7x5) +7 = 35+7 = 42% chance of making it through the field to attack the device's user. One attempt to enter the field may be made per round. Magic resistance must be checked before a creature possessing this characteristic (such as a dragon or fiend) makes its “turn away” roll; if the resistance check succeeds, the creature may enter the field easily.
The shell's effects last as long as the egg is kept spinning, an activity a spinner can keep up for one turn per point of Constitution. After that the user has to rest for as long as the shell spun. The spinner suffers an Armor Class penalty of -2 while concentrating on keeping the shell in motion, spinning it with the fingers.
Variations of this item have been seen that protect specifically against certain types of creatures, such as undead, dragons, and so forth, but these are half the XP and
GP value of the type stated above. 
Category:Encyclopedia Magica Magic Items
Category:Magic Items
Category:Magic Eggs