Becca, Audacious Prefect

When Becca, Audacious Prefect enters the battlefield, proliferate.
{w}{w},{t} Target creature you control gains first
strike until end of turn.
{u}{u},{t} Tap target creature.
{r}{r},{t} Sacrifice a creature. Destroy target
artifact with mana cost less than or equal
to the sacrificed creature's power.
"I have just the thing."