Unified Defense Against Goetia

Kicker {1}{w} (You may pay an additional {1}{w} as you cast this spell.)
Creatures you control get +1/+2 and gain flying and lifelink until end of turn. Untap those creatures. If Unified Defense Against Goetia was kicked, prevent all damage that would be dealt to you and creatures you control this turn.
"On this alone, we can agree. Mankind shall not fall
to the Beast this day!"