[this is not meant to be official, obviously]
Inspired by various boss blind variation videos I found on Youtube. Occurs at Ante 8. Blind changes to a random ".vs" Boss Blind each hand (as seen below). All Bosses are references to vivid/stasis.
DUSKBREAKER.vs
Final Boss Blind
[ERROR: DATA NOT FOUND]
[Recovering data...]
[5 lines found.]
[0: "Cannot be disabled."]
[1: "Blind effect changes each hand."]
[2: "Hands are doubled."]
[3: "10x base Blind requirement."]
[4: "Cannot be skipped."]
Liberator_D.vs
Boss Blind
If the played hand contains 2 of the same card (Rank and Suit), it does not score.
Worldkeeper_T.vs
Boss Blind
Highest-ranked card(s) in your hand are debuffed.
Storyteller_S.vs
Boss Blind
All modifiers are disabled, except Negative.
Protagonist_S.vs
Boss Blind
All Rare Jokers are debuffed.
Partner_A.vs
Boss Blind
Your most played poker hand does not score.
???_K.vs
Boss Blind
Scored cards permanently become a random Rank and Suit after scoring.
???_E.vs
Boss Blind
Jokers are flipped and shuffled. Cards in the hand are flipped and shuffled.