Xikal, Nightmare's Conduit

Xikal, Nightmare's Conduit cost {3} less to cast if an opponent has 10 or less life
{b}{b}: Search your library for a horror card and put it into your hand
Horrors you control have "Discard a card: put a +1/+1 counter on this creature" and "Exile three cards from your graveyard: put a +1/+1 counter on this creature"
At the beginning of your upkeep, sacrifice two creatures to put a card from your graveyard into your library