Ironclad has enough healing from his Starter Relic and Campfire Rests that taking a card which is otherwise nearly blank in fights isn't very appealing, especially since many times you are offered Not Yet will be in Boss Rewards where it's up against two other Rares.
A powerful sustain effect that you can use to fuel self-damage cards or just to heal damage back from combats. You might need to skip playing this the first time and draw back into it later.
