Custodi Soulcaller is a uncommon Creature — Human Cleric card from Conspiracy: Take the Crown (CN2), collector number 15. Current market price: $0.31 (foil $0.64), TCGplayer market prices via Scryfall.
Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.) Whenever this creature attacks, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the number of players you attacked this combat.