Drain

Two-way life-swing effects that drain an opponent's life total and pad yours in one motion. Gray Merchant of Asphodel hits each opponent for life equal to your devotion and gains you that much; Kokusho, the Evening Star drains 5 from each opponent on death; Sanguine Bond and Vito, Thorn of the Dusk Rose convert your lifegain into opponent life loss; Exquisite Blood mirrors it by gaining you life whenever an opponent loses any. Distinct from Aristocrat, which specifically rewards creatures dying with small ping-and-gain triggers; drain covers any source of paired life loss and lifegain, whether from an enters trigger, an upkeep tax, or a lifegain conversion.