Harbinger of Aysen

Flying, Ghost Strike (When this creature dies, exile
it. While in exile, you may pay its mana cost once a
turn to have it deal damage equal to its power to
target attacking or blocking creature.)
Whenever Harbinger of Aysen deals damage to a
creature, put a -1/-1 counter on that creature,
then create a token copy of that creature with
base power and toughness 1/1, Flying and the creature type Splinter.