Luring Mermaids

When Luring Mermaids attacks, target creature
an opponent control must block this creature if
able. At the end of the combat phase, if that
creature is still on the battlefield, tap it, it doesnt
untap during it's controller next untap step.
{g}{g}{g}: This creature gains +2/+0 until end of
turn.
"Sisters fallen, victims of a dark shadow"
-Talunis