DiceVR
the monster king probably took many fragments or splinters from creatures and combined them together to make a cluster the question is will Eiro gain a role later on? maybe themonster king might have tried to make a new body for himself so he could abandon the role of monster the more likely answer is he just wanted more power
I think the cards are the divine power, maybe because eiro is a artificial being he has no limits to obtain The cards. Or eiro is a Experment with the Monster King and The Sun to make a clone of the Monster King but eiro mutated to gain willpower over himself. Also, I bet all the royals are all labeled as âFinal Bossesâ and maybe Eiro became a double cluster by killing The World.