This card’s effect is an Ignition Effect.
Tributing a monster is a cost. You cannot Tribute a monster if you do not have a monster with the appropriate Attribute in your hand to Special Summon.
If this card is flipped face-down, any monsters Special Summoned by her effect will not be destroyed. If this card is destroyed while she is face-down, any monsters Special Summoned by her effect will not be destroyed.
If a monster Special Summoned by this card’s effect is flipped face-down, it will not be destroyed when this card is destroyed.