Darkwraith

Vigilance, first strike, intimidate
Whenever Darkwraith attacks you may pay
{2}{b}{b}, if you do target blocking creature gets
-2/-2, and you gain 2 life.
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The three Sealers were placed to guard the
ruins until the arrival of one who could slay the Four
Kings. When the Chosen Undead broke the seal and
opened the flood gates, the Darkwraiths emerged
once more."