Darkcult Worship-Leader

Worship (Whenever another creature enters the battlefield, if this creature has not previously worshipped another creature, you may have this creature worship that creature. If you do, that creature gets +1/+1 for as long as you control this creature.)
Creatures worshipped by Darkcult Worship- Leader have deathtouch and "Whenever a creature dies, target opponent loses 1 life and you gain 1 life."