Chakravartin Sphinx

Once per turn, if the battle position of another monster(s) on the field is changed: You can target 1 card on the field; return it to the hand. You can only use each of the following effects of "Chakravartin Sphinx" once per turn. If the battle position of a monster(s) is changed: You can banish 1 Spell from your GY; Special Summon this card from your GY (if it was there when the position changed) or hand (even if not). During your Main Phase: You can Set 1 "Book of Taiyou" and/or 1 "Book of Moon" from your Deck and/or GY.