Taph, Harvester Ascended

+1: Put the top three cards of your library into your graveyard. Gain 1 life for each card put into your graveyard from anywhere this turn.
-1: Sacrifice a nontoken creature. If you do, put X +1/+1 counters on target creature, where X is the sacrificed creature's toughness.
-7: You get an emblem with "Whenever a card is put into your graveyard from anywhere, target creature gets -1/-1 until end of turn."