Dissolving Shield (Blue)

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.
Instant -- Remove a steam counter from this: Prevent the next 1 damage that would be dealt to you this turn. If this has no steam counters, destroy it.