Magalon

When magolon enters the battlefield all succubus and demons base power and toughness are equal to her

{p/g}: put a +1/+1 counter on target creature.
{g}{p/g}{ut}: All Creatures you control getting trample vigilance and deathtouch
{p/g}{p/g}{10}{ut}: magolon's power and toughness are 50/50

Magolon: One day my love I will make you mine all mine