You have a chance of receiving monsters you have defeated when you finish a floor.
You can sometimes receive monsters you did not even fight, and certain monsters will not drop in certain dungeons even if you fight them often. (ex 3 legged raven in silver mines))
Summoning
Each bronze summon has 98% chance of giving you a monster and a 2% chance of giving a basic hime. (give you a variant basic on Events only!)
Using Monster Cards
Battle
Monster cards can be placed in your deck and used in battle just like Hime cards.
Unlike himes, when a monster dies in battle, the player loses that card.
Monsters cannot be healed with food or god wine, but they can be healed by healers in the course of battle.
Experience
Monsters can be used to give himes experience by "fusing exp".
Himes cannot complete a level in combat or travel, so fusing is required.
Each monster will give a different base amount of exp, plus 100xp per level.
Unity Material
Monsters can be used as material in a special unity.