This page notes details of The Masked Beast (DARK/Fiend/Ritual Monster) : decks, tips, effect and rulings. Learn and enjoy playing Yu-Gi-Oh! Duel Links!
I don't think you currently can. That being said, you could just use Contract with the Abyss instead, the only monsters you're likely to Tribute are Level 4 or 8 anyway. I do wonder how you managed to get a Masked Beast and not Curse, though.
NMS
King Of A Higher Plane Shinato is much better than this guy XD
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