Holographic Card Idea!

[TyBraniff]

It would be cool to see a "Holograhic Card" for bosses like Gundam/Phaseman/GigaSlime/Winter/etc.

Now go ahead and tell me when to stop cause im gonna suggest some hella-damn madness below:
Make the 'Holographic Card' boss fight's only obtainable after you've collected EVERY card that was available up to that boss. i.e.

• Giga Slime = Slime, Honey Bee, Bloomo and Rabby Cards
• Phaseman = Boar + all the Haunted Wood Cards
  
• GUNDAM = All the Sky Temple's Cards
  
• Enraged Toy Machine = All the Seasonne's Cards
  
• Winter = All the Season Temple's Cards
• Power Flower = All the Mount Bloom Cards
• Mimic = All the Tai Ming Card's
• Zhamla = A human card.

Add a little difficulty to the players by amping the bosses health up based on the parties average level and perhaps adding some more attacks and such, start the player at a fixed max health (i.e. 1 or two hits and they're dead) ya know just a little flare to the fight.
Of course don't forget to make it semi-grindy but not to much because of ALL THE GRINDING IT TAKES JUST TO DO THE FIGHT.

alternatively.....if....ya know this is to much.......
Make "arena challenge" versions of each boss and have them drop holographic cards, i.e. like you have with the Enraged Giga Slime but give a rare chance at a "Holographic card".