-Brick: this card cannot be played, and can only be removed from your hand via swap/discard effects. (doesnt have to be a brick, could be like 'null' or something. whoever gets this card has to rework their playstyle to focus on removing the Brick. adds more weight to discard effects and gives better functionality to the Gift card)

-All swap: Everyone swaps their deck to the next player over, in the direction of play.

-Shift: upon playing, draw a card and place it on top of this one. If it's a wild, you choose the color. (the point of this one is to essentially reset the stack, by putting a random card next)

Target card: Play another card on top of this. if it has an effect, choose which player receives it. (this would replace the +4T card, and i think gives players more control, rather than attacks just being limited to the direction of play. it means you could send a +10 to the guy who just called uno, but there would only be like 1 or 2 in the deck)

Seek: take the next three cards from the draw pile, order them in any way, then return them to the top of the draw pile. (allows players to 'tell the future' and influence the game in a way that isn't direct)

-Discard (color): upon playing, discard all of the matching color from your hand.
-Discard wild: upon playing, choose a color and discard all of that colors from your hand.
(i think these are balanced because theres 8 colors in the game. it could also be a detriment because youd possibly have to throw out good color cards like +4 or #)