Steamwhisker Saboteur

When Steamwhisker Saboteur enters the battlefield, you may sacrifice an artifact. If you do, put a +1/+1 counter on Steamwhisker Saboteur, and it gains flying until end of turn.
Raid Ability:
Whenever Steamwhisker Saboteur attacks, if you attacked with a creature this turn, you may tap target artifact or creature defending player controls. It doesn't untap during its controller's next untap step.