Nine, nine, nine, nine!

This spell costs {5} less if two criteria are met.
If an opponent has exactly 9 creatures,
destroy all creatures.
If an opponent has exactly 9 cards in their
hand, they discard their hand.
If an opponent has exactly 9 lands, they lose
9 life, and you gain 9 life.
If an opponent has exactly 9 life,
Nine, nine, nine, nine! does 9 damage to them.