Snow Globe

The Snow Globe can be obtained from opening presents, but only in hardmode worlds. It summons the Frost Legion, an event very similar to Goblin Invasion. There are three kinds of enemies that will be summoned:
 * Snow Balla, which throws snow balls
 * Mister Stabby, who has a knife
 * Snowman Gangsta, with a Tommy Gun.

Caution should be used if the player summoning the Frost Legion is inadequately geared (i.e. in pre-hardmode items), as the enemies spawned are much stronger than those of e.g. the Goblin Invasion.