Harrow, Walker of the Abyss

Annihilator 3, Trample, Skulk, Deathtouch,
Flying
When Harrow, Walker of the Abyss enters the battlefield mill 5 and gain 5 life.
When Harrow, Walker of the Abyss dies, choose
one,
•Mill 5 gain 5 life.
•Target creature you control gains the ability, {t}: Mill 2 gain 2 life.