Cheryl Mason, The Chosen One

When Cheryl enters the battlefield, search your library for a card called Harry Mason put it in
your hand, then shuffle.
Whenever Cheryl become the target of a spell,
it phases out.
{2}{w}{b}, sacrifice Cheryl: Create a token creature called Incubus. It has flying, haste and hexproof. Activate this ability only if you control Alessa Gillespie and only as a sorcery.