The twentieth card is The Flute of Summoning Kuriboh, which let’s you choose a Kuriboh or Winged Kuriboh from your deck and put it in your hand or field. Winged Kuriboh is the one most likely to be special summoned by this, since its effect activates whenever it is destroyed on the field, but if you have Multiply and/or Detonate in your hand as well this is a card that can get Kuriboh onto the field for that combo. If you have Transcendent Wings you can get Winged Kuriboh LV10 with its help as well. This card is actually really good support for those two cards. If you can use it then it seems like it would generally be a good idea to have it.