Teachings of Melmastor

If an effect would have you flip a coin, roll a d20
instead. If that effect's results depend on whether
the flip comes up heads or tails, choose either
heads or tails first. A won flip comes up as your
chosen result, and a lost flip comes up as the
result you didn't choose.
•1-10: You lose the flip.
•11-19: You win the flip.
•20: You win the flip twice.