Rearranging Automaton

Rearranging Automaton enters the battlefield with
X +1/+1 counters.
When Rearranging Automaton dies, reveal cards
from the top of your library until you reveal an artifact with converted mana cost less than Rearranging Automaton's power. You may play
that card without paying its mana cost. Put all revealed cards not cast this was on the bottom of
your library in a random order.