Quiz Skeletons

Enchant target player.
When you cast this spell on an opponent, write
a question about a person that you both know
of. That player may attempt to answer the
question at any time. For each wrong answer,
you may create a 1/1 black Skeleton token. If the
correct answer is given, sacrifice this
enchantment. Enchanted player may pay {p/c}
to compel you to truthfully answer a yes/no
question about the correct answer.
Enchanted player cannot gain life.