The Citadel of Chaos

You begin your fight with the creature.
Your first blow is lucky and severs one of its six heads.
The other five strike at you and, to your horror,
two more heads grow where the other one died!
One of the heads bites deep into your arm.
Your sword is obviously going to be of little use.

Will you use a Creature Copy Spell ?

or something from your backpack ?