Burning Pact
Burning Pact is a 1-Energy Ironclad skill (0 upgraded) that Exhausts 1 card and draws 2. The net effect is: spend 1 Energy, lose 1 card, gain 2 cards. This is card-positive draw — you're trading a card and Energy to gain a net +1 card while also potentially removing a weak card via exhaust. In exhaust-synergy builds, the exhaust is a bonus effect. Even without synergy, removing dead cards while drawing fresh ones improves your hand quality.
Upgraded to 0 Energy, Burning Pact becomes a free net card draw that also triggers exhaust effects at no Energy cost. In Feel No Pain builds, each 0-cost Burning Pact draws 2 and generates 3 Block. It's a strong uncommon that rewards exhaust synergies and remains solid even without them. One of the Ironclad's best card draw options.