Legion Vanguard {1}{B}
Creature — Vampire Soldier
{1}, Sacrifice another creature: This creature explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)
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Cards that do something similar expected a card that isn't here?
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The Ever-Changing 'Dane 93%
$0.22#18813
"{1}, Sacrifice another creature: this card becomes a copy of the sacrificed creature, except it has this ability."
Ayli, Eternal Pilgrim 92%
$0.24#5473
"{1}, Sacrifice another creature: You gain life equal to the sacrificed creature's toughness."
Pitiless Pontiff 90%
$0.24#18215
"{1}, Sacrifice another creature: This creature gains deathtouch and indestructible until end of turn."
June, Bounty Hunter 84%
$0.19#14580
"{1}, Sacrifice another creature: Create a Clue token. Activate only during your turn."
Circle of Despair 83%
$2.68#23104
"{1}, Sacrifice a creature: The next time a source of your choice would deal damage to any target this turn, prevent that damage."
Alseid of Life's Bounty 83%
$0.35#2672
"{1}, Sacrifice this creature: Target creature or enchantment you control gains protection from the color of your choice until end of turn."
Kels, Fight Fixer 83%
$0.32#16592
"{1}, Sacrifice a creature: this card gains indestructible until end of turn."
Disciple of Griselbrand 82%
$0.27#12225
"{1}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness."
Dina, Soul Steeper 82%
$0.28#2755
"{1}, Sacrifice another creature: this card gets +X/+0 until end of turn, where X is the sacrificed creature's power."
Resolute Watchdog 81%
$0.34#8125
"{1}, Sacrifice this creature: Target creature you control gains indestructible until end of turn."