Alezandra's Gift

When you attack with three or more creatures,
you may pay {r}{w} to cast Alezandra's Gift
instead of its normal cost.
Scry 3, then reveal the top card of your library.
You gain X life, where X is the revealed card's
mana value, and up to X creatures you control
gain indestructible until end of turn. Then put
the revealed card into your hand.