Mayhem Biele, Court Mage

When Mayhem Biele enters the battlefield, search
your library for a card named Harmony Biele,
Master-At-Arms or Ambivalence Biele, High
Priestess, reveal it, and add it to your hand,
then shuffle.
Whenever you cast an instant or sorcery spell with
only one target, copy that spell for each Warlock,
Sorcerer, and Wizard you control.
You may choose new targets for the copies.