Kira & Ryuk

Lifelink, Hexproof
Whenever an opponent has a creature enter
the battlefield that was cast from there hand,
if it has a name that player sacrifice it unless they
pay 3 life. if a creature was sacrificed this way
Kira and Ryuk lose Hexproof till the end of the
turn.
Whenever a creature an opponent controls is
sacrificed, Kira and Ryuk gets +1/+1 equal to
the creature's toughness till the end of
your next turn.