Well, there's more questions in here than my original question (because I wanted examples), so what's possible and not on all the new variables etc would be nice, but the core question is if having a C/U/R* N-effect could exist. If it could, how it would be written, if it would be fixed at one exact rate, etc.
1. "Bricks: +N
N = Recruits cost of last card played by opponent (max 10)
N* rarity of card (C-1, U-1,5, R-2)"
2. "Each player receives N damage
N = # of keywords in hand * The highest rarity of those cards (C-1, U-2, R-4)"
3. "Gain resources equal to the cost of a new card in your hand of highest rarity (max 3 of each * rarity (C-1, U-2, R-4)
Thoughts?