Oberon's Final Act

Destroy any number of target artifacts. Create
a Legendary artifact creature named "Oberon's
Ace" with power and toughness equal to the
number of artifacts destroyed this way.
Adamant — If at least 4 white mana was
spent to cast this spell, the token gets Lifelink.
Adamant — If at least 4 blue mana
was spent to cast this spell, the token gets Flying.