Prophecy of Loss

Indestructible, Shroud
When this card is cast, place 3 lore counters on it. When all lore counters are removed, sacrifice it.
{b}, Exile X creatures in a graveyard: Remove a lore counter from Prophecy of Loss. Reveal the top cards of your library for an aura card with converted casting cost X and attach it target creature you control. Shuffle your library.
But what measure is there in my wretchedness? Say, how can it be right to neglect the dead?
-Sophocles, Electra