[SPOILER] Anyone knows how to get a card "Proof" on Metal Island?

[Pink]

They tell you about a card champion, but I grew tired of searching everywhere.
Will be appreciated if anyone can share any info about it.

[Tipuzzle]

You'll need to complete two side quests.

The first will involve the ladybug and blue ant; they will unlock a shady place for you.

Once you're in that shady place, chat with everyone there. One person should be very interested in card games. You'll soon be sent on a quest to find the four card masters of Bugaria!

Once you complete this quest and defeat the four masters, you should have all the proof you need.

I hope this helps.

[Pink]

Oh I remember the dude now, and I thought I spoke to everyone there.
Many thanks friend.