Boom Grenade (Red) (EVO084) Rainbow Foil - Bright Lights

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 4 damage to them.