Mercy, the Dual Aligned

Split (You may cast either face of this card for that face's casting cost.)
Vigilance, lifelink
Whenever a Demon creature enters the battlefield under your control, you may return Mercy, the Dual Aligned to her owner's hand.
"I want so desperately to be virtuous, but fear what vices I might admit."
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This card is dedicated to murkletins. Thanks for the support!