However, the interface for these cards is significantly different than the norm. If the player doesn't read tooltips beforehand they may believe they have 1d100 chance of beating a value less than 20.
You have no messages about the rolls until the message that displays success or failure--unless you check the tooltips. A game's interface should not rely on tooltips obviously.
I suggest the UI use the same method of showing opposed rolls as other stratagems.

