Kemuri, the Smoke-Scaled

If one or more -1/-1 counters would be put on
Kemuri, you may create that many Fume tokens
instead. (They're artifacts with "{1}, {t}, Sacrifice
this artifact: Prevent the next 1 damage that would be
dealt to target permanent or player.")
Whenever all damage a creature or planeswalker
would deal is prevented, you may pay {2}. If you
do, destroy that permanent.