ironclad rare cards The 10 Best to Use in Slay the Spire 2 Ironclad Uncommon Tier List :

[19] Players expand their card library for deck construction through booster packs, which have a random distribution of cards from a specific Magic set and are defined by rarity

Keep this card in the Active Spot, and as it gets hit by attacks, it does a chip damage of 20 to them

Growing a Hamster token to a size that it could take on Emrakul just does not get old

Not for a second

This card definetly isn't worth 3 exp, as it is strictly worse than its Rogue's counterpart (which arguable should be higher level) with a stricter requirement of an extra action to trigger (basically a 50% difficulty increase to trigger the effect): even the fact it is slotless does little to change my opinion