Veil of Secrecy

When Veil of Secrecy enters the battlefield, put X 1/4 blue Illusion creature tokens with "When this creature becomes the target of a spell or ability, sacrifice it." onto the battlefield.
When you would receive damage from a source an opponent controls, you may sacrifice an Illusion permanent that you control, chosen at random. If the sacrificed permanent was not Veil of Secrecy, prevent that damage.