Boom Grenade (Yellow) [AIO020] (Armory Deck: Dash)

Crank (As this enters the arena, you may remove a steam counter from it. If you do, gain an action point.) This enters the arena with a steam counter. At the start of your turn, destroy this unless you remove a steam counter from it. When a Mechanologist attack action card you control hits a hero, destroy this and deal 3 damage to them.