Rackety Scavengerwagon

{2}, {t}, Sacrifice Rackety Scavengerwagon: Draw
a card, then exile the top card of your library.
You may play that card this turn.
Tap two untapped creatures or two artifacts you
control: Rackety Scavengerwagon becomes an
artifact creature until end of turn.
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"What shall thee doth withal yond junk in thy trunk?"
—A Lov'd Hump, Proft's first case study