Ustrin, Sickly Temptation

Haste, indestructible
When Ustrin, Sickly Temptation enters on battlefield deals X damage to target creature or player. Being X the number of cards in your graveyard plus the number of mountais you control.
"From the third I lost count, were so many sick thoughts that the only ones who had not succumbed ... Were scattered by the floor." -Psalms 153