Twin bosses

the bosses

 * names: Eclipse Twins: Amaterasu (female) and Tsukuyomi (male)
 * both are humanoid bosses
 * Tsukuyomi is a defender type boss with a large shield and a weaker mace type weapon
 * Amaterasu is an offense type boss with two swords
 * in order for one to die, both must be killed within 5 seconds of the other or the other will respawn with the same amount of hp as its counterpart
 * Amaterasu's ability when she hits red life is to get increased speed
 * Tsukuyomi's ability when he reaches red life is to get increased strength
 * fight in a tag team style: when someone attacks Amaterasu, Tsukuyomi blocks; when someone attacks Tsukuyomi, Amaterasu attacks attacker
 * they can only use this style when the other is not already defending or attacking
 * kirito will get the final hit on one boss while asuna gets the final hit on the other, earning them both powerful new weapons

the boss guardians

 * 6 knights in full armor
 * each has a different type of weapon
 * halberd
 * mace
 * spear
 * sword/shield
 * war axe
 * war hammer