Junkrat, Wanted Criminal

Whenever Junkrat, Wanted Criminal enters the battlefield or attacks, you lose 1 life and create a
Junk token. (It's an artifact with "{t}, Sacrifice this artifact: Exile the top card of your library. You may
play that card this turn. Activate only as a sorcery.")

Whenever a token you control leaves the battlefield,
put a +1/+1 counter on Junkrat.