Liuquill, Stealth Mage of Fire

This creature can't be blocked.
After this creature attacks, exile it unless
you pay {10}{b}{r}.
When this creature attacks, divide Liuquill, Stealth Mage of Fire's damage by two
unless you pay {b}{b}{b}{b}{r}{r}{r}{r}. If it is an
uneven number, round up.