A very warm darkness

As an additional cost to cast this spell, sacrifice a creature
you control.

Search your library for a creature card, reveal it
and add it to your hand, then shuffle. If the card
revealed cost less than or equal to the sacrificed
creatures CMC, you may cast it without paying its
mana cost.

Within the Abyss, in a place unforgiving and
treacherous, Vueko found something worth living for. Her very own... warm darkness.