Regret

Regret is a .
At the end of your turn, lose 1 HP for each card in your hand. Because this isn't technically considered damage, the HP loss bypasses , and even if you manage to play all the other cards in your hand you'll still lose 1 HP any time you are left feeling regret. The inexorable leeching of your limited health is quite dangerous.
==Sources==
*Golden Shrine
*Big Fish
==Update History==
*Patch V1.1: The Dealer
**Fixed Regret causing less HP loss than normal if other cards played themselves first.
*Weekly Patch 50: The Third Act
**Regret card wording improved to clarify interactions with cards like Rupture.
*Weekly Patch 10: Quality of Life
**Fixed issue where Regret/Decay/Doubt/Burn fails to exhaust via Blue Candle and Medical Kit.