Changes

* If the card or effect that Ritual Summons does not mandate an exact amount of Levels (e.g. "''You must also Tribute monsters from your hand or field whose total Levels equal 6 or more.''"), the player cannot Tribute additional monsters if they met the minimum Level requirement already.<ref>{{cite web |url=https://yugiohblog.konami.com/articles/?p=1408 |title=Absolute Powerforce Preview: Djinn Disserere of Rituals |author=Jerome McHale |date=3 February 2010 |publisher=Konami |accessdate=12 December 2015 |quote=When you Ritual Summon a monster, you need to Tribute monsters whose total Levels{{sic}} at least the Level of the monster you want to Summon, but you aren’t allowed to “overpay.” For example, if your Ritual monster{{sic}} is Level 7, you can Tribute a Level 5 and a Level 3 monster. You could not Tribute a third monster for that Ritual Summon.}}</ref><ref>{{cite web |url=https://yugiohblog.konami.com/articles/?p=3669 |title=How Ritual Summons Work |author=Scott Miller |date=23 February 2009 |publisher=Konami |accessdate=12 December 2015 |quote=Some Ritual Spells let you go over that number, others require the Levels of the Tributes to exactly match the Level of the Ritual Monster. No matter what, if you have already selected enough monsters to fulfil{{sic}} the requirement, you can’t Tribute any extra ones.}}</ref><ref>{{cite web |url=https://yugiohblog.konami.com/articles/?p=6852 |title=Secrets of Eternity: Netherlord of the Flies |author=Scott Miller |date=6 January 2015 |publisher=Konami |accessdate=12 December 2015 |quote=Remember, though, that you cannot overpay by Tributing more monsters than necessary to meet the “total Level 6 or more” requirement.}}</ref>

** Monsters that do not have Levels, such as [[Xyz Monster]]s or [[Link Monster]]s, cannot be Tributed for a Ritual Summon.

* When a card or effect that Ritual Summons resolves, if monsters cannot be used for the Ritual Summon or the [[Ritual Monster]] cannot be Ritual Summoned, no Ritual Summon occurs, nor are any monsters used for the Ritual Spell Card's monster requirement.<ref>{{cite web |url=http://entertainment.upperdeck.com/yugioh/en/gameplay/faqs/cardfaqs/default.aspx?first=L&last=O |title=Individual Card Rulings [L-O&#93; |publisher=UDE |at=Mask of Restrict |accessdate=12 December 2015 |archiveurl=http://web.archive.org/web/20090220023927/http://entertainment.upperdeck.com/yugioh/en/gameplay/faqs/cardfaqs/default.aspx?first=L&last=O |archivedate=20 February 2009}}</ref><ref>{{cite web |url=http://entertainment.upperdeck.com/yugioh/en/gameplay/faqs/cardfaqs/default.aspx?first=L&last=O |title=Individual Card Rulings [L-O&#93; |publisher=UDE |at=Lightforce Sword |accessdate=12 December 2015 |archiveurl=http://web.archive.org/web/20090220023927/http://entertainment.upperdeck.com/yugioh/en/gameplay/faqs/cardfaqs/default.aspx?first=L&last=O |archivedate=20 February 2009}}</ref>