Chaos Vault Ritual

CardTable2
 * kanji = カオスボールトの儀式
 * phon = Kaosu Boruto no Gishiki
 * attribute = Spell
 * typest = Ritual
 * ritualmonster = Chaos Sky Ritual Dragon
 * lore = This card can be used to Ritual Summon any Ritual Monster from your hand. You must also Tribute monsters from your hand or field whose total Levels equal or exceed the Level of the Ritual Monster you Ritual Summon. If this card is in your hand while there is no Ritual Monster card in your hand: you can Ritual Summon 1 "Chaos Sky Ritual Dragon" from your Deck. If you do, then Tribute monsters from your field whose total Levels exactly equal Level 7.