Abigail, Little Silver Key

Whenever a non-token creature you control
attacks an opponent or a planeswalker, you may
create a 1/2 Black and White Octopus Token that
has "{p/b}{p/w}{t}: Sacrifice this creature; add 3 mana
to your mana pool in any combination of Black
and White" and is attacking that target. Destroy
this token during your upkeep step, unless you
pay {p/c}
If there is 5 or more Black and White Octopus
Tokens on the field, transform Abigail.