Circle of Protection: Ooze

Creatures with type "Ooze" can not attack you.
{1}{g}: Sacrifice a creature to create a 1/1 green
ooze creature token with X +1/+1 counters on
it, where X is half of the sacrificed creatures
power + toughness, rounded down.
{1}{g}: Tap an untapped ooze you control to
tap target creature.
"He created a magical barrier at the caves entrance.
Intelligent creatures could pass it any time. However,
everything else could only enter the cave, but not leave,
providing a steady supply of food for the