The Nightmare

Deathtouch, fear
This card's name is also "The Princess" while on
the battlefield.
As an additional cost to this spell, exile a creature
named "The Princess" from your hand or field.
When The Nightmare enters or attacks, put an
organ counter on target creature. A creature with
organ counters on them gain "at the beginning of
your upkeep, sacrifice this creature unless you pay {1} for each organ counter on it".