Monster Egg

The Monster Egg is a highly useful throwable weapon that spawns a random mod to aide you or harm other opponents. Because this item spawns fairly commonly, it is highly valued. It takes the picture of the Creeper Spawn Egg.

Effects and Mob List
When thrown, there is a short period bewteen activation. When activated, it will spawn one of the following mobs:
 * Giant - The rarest and deadliest spawned mob. When summoned, the giant will roar and jump, destroying any block it touches. When it lands, it will die in a massive explosion, severly damaging the terrain and players. Players damaged by the giant usually die very quickly.
 * Lamb - This mob is useless and does absolutely no damage, although it can serve as a distraction to players.
 * Villager - Instead of damaging players, the villager spawns in several random items, which can be used by you and enemies alike.
 * Supercharged Creeper - The creeper acts like a normal one; it will follow players, then explode when it gets near one. However, since it is charged up with lightning, it will result in heavy damage and a large blast radius.
 * Cave Spider - The cave spider will do either of two things: attack you, or spawn and do nothing. Attempting to provoke the spider to attack other players is dangerous, as the cave spider can quickly damage you in large amounts.
 * Blaze - Acting like a normal blaze, this mob will fly up and launch a volley of fireballs. The launched fireballs act like shots from a Fire Flower.
 * Ghast - Depending on where it is spawned, the ghast can suffocate and die before it is able to launch its attack, a series of 2 fireballs. The fireballs do not set the player on fire, and they do random damage between 0-50.
 * Enderman - Endermen can and might attack you instead of enemies. Like normal Endermen, they will teleport around and attack players, dealing out 20 damage per hit.

Strategies

 * There is no way of knowing what mob will spawn from the egg, so be very careful.