I considered that also, but that seems way too powerful, especially of more than one resource is banished.
During debugging, when I restrict card pool to a matching single-resource cards, my win rate with “basic” heroes (Warrior, Mage, Rogue, Priest) goes to nearly 100% even with ascensions.
So it seems like some compromise is needed. I will definitely add more banishing options to the game.
What do you think about adding resource-banishing rare items with corresponding hard quests, similar to how the current game handles “immunity” items (Jade Ring, Helm of Courage etc.), which are also very powerful?
Also, the game have many items and cards such as Shimmering Robe and Kaleidoscope, intended specifically to help with using “off-color” cards in the deck. Do you feel those options are too rare or not sufficiently strong to justify picking such cards?