Voshus Aren, the Living Rite

Flying, hexproof
Warlock spells you cast and activated abilities of
other Warlocks you control cost {u}{b}{r} less.
This effect only reduces the amount of colored
mana you pay.
{u}{b}{r}, Pay 3 life: Return target Warlock from
your graveyard to the battlefield. Activate this
ability only as a sorcery.