Saya, Adorable Girl

While Saya is on the battlefield, other creatures you control lose all other abilities, and are instead 1/1 white humans with "when this creature dies gain 1 life, then draw a card".

When Saya deals combat damage to a player, destroy all creatures that player controls.
Then create 2/2 black horror tokens with "when this creature dies, lose 2 life" equal to the number of creatures destroyed in this way.

"You're so cute! I could gobble you up."