Card Tips:Yellow-Bellied Oni


 * This card goes well with "Rank-Up-Magic" cards; as it allows you to summon the "CXyz" or "Number C" monsters as per your desire (provided you meet the other criteria, such as the type).
 * On this note, you can use this card's effect to reduce the Rank of a Rank 5 "Number" monster you control, and use on it "Rank-Up-Magic Limited Barian's Force" to Xyz Summon "Number C106: Giant Hand Red", and gaining its effect.