For Blue stake, I think a mini boss would be good instead of -1 discard, and ive made 5 bosses that are similar to the main finishers. Mini bosses appear at ante 4.
Luminous Coin - All cards are flipped, starting, after discard, everything
Sepia Sword - Rightmost Joker is debuffed
Emerald Shield - 5x blind size
Azure Rose - One suit is debuffed at random, the more of that suit you have in deck, the more likely it is chosen, change every hand
Copper Club - All jokers and cards are pinned (cannot be reordered)