Boom Grenade (SDA023) [Silver Age Chapter 1]

<strong>Crank</strong> <em>As this enters the arena, you may remove a steam counter from it. If you do, gain an action point.</em><br>This enters the arena with a steam counter. At the start of your turn, destroy this unless you remove a steam counter from it.<br>When a Mechanologist attack action card you control hits a hero, destroy this and deal 4 damage to them.