Tremble

Tremble is a 1-cost Common Skill card for the Ironclad that applies 2 Vulnerable to the target. This cheap, dedicated Vulnerable application lets you set up damage amplification without needing an Attack card that also applies it.

Tremble sets up every Vulnerable exploiter: Vicious hits twice, Stampede draws cards, Bully deals bonus damage, Dismantle hits twice, and Pillage steals Strength. Dominate converts the Vulnerable into your own Strength. Follow Tremble with heavy hitters like Bludgeon or Hellraiser for 50 percent more damage. Molten Fist doubles the Vulnerable from 2 to 4 for an extended window. Taunt provides AoE Vulnerable as an upgrade to Tremble in multi-enemy fights.

Tremble is a basic but effective Vulnerable enabler for the Ironclad. Pick it when your deck has Vulnerable-exploiting cards but lacks reliable application. Against bosses like Ceremonial Beast, cheap Vulnerable application before heavy Attacks is the standard gameplan. It becomes less necessary as you pick up Brand or Mangle, which combine damage with Vulnerable. A Common card that enables the entire Vulnerable archetype for the Ironclad.