Liliana's Exemplar

Sacrifice Liliana's Exemplar: Draw a card.
Threshold - Liliana's Exemplar has Unearth {2}{b} if seven or more cards are in your graveyard. ({2}{b}: Return this card from your graveyard to the battlefield. It gains haste. Exile
it at the beginning of the next end step or if it
would leave the battlefield. Unearth only as a sorcery.)