Changes

==TCG OCG Rulings==*You can chain "The effect that increases LP is a [[Trigger Effect]]. (It does not [[target]].)<ref name="No.7738">{{cite web|url = https://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=7738&request_locale=ja |title = Thought Ruler Archfiend |website = Konami OCG Card Database |accessdate = 2023-11-19}}</ref>* This effect activates mandatorily at the end of the Damage Step in which "Thought Ruler Archfiend]]" destroyed an opponent'smonster by battle.<ref name="No.7738" />* This effect when does not activate if "Thought Ruler Archfiend" battles a monster with the same ATK and both monsters are destroyed.<ref name="No.7738"/>* The effect that negates the activation of a Spell/Trap Card is a [[Psychic]]-[[TypeQuick Effect]] . (It does not target. Paying 1000 Life Points is the cost to activate this effect.)<ref name="No.7738"/>* This effect is activated directly in Chain to the card activation of a Spell/Trap Card that targets only 1 Psychic monster. (It cannot be activated in Chain to the effect activation of a Spell/Trap Card. It can be activated in Chain not only to the activation of a Spell/Trap Card that targets a Psychic monster on the field, but also to the activation of a Spell/Trap Card that targets a Psychic monster that is banished or in the Graveyard is targeted.)<ref name="No.7738"/>

*“===Q&A Rulings==={{Ruling| Q = If an "[[Embodiment of Apophis]]" treated as a Monster Card by its own effect is destroyed by battle with "[[Thought Ruler Archfiend]]’s” ", is the effect can be of "[[Thought Ruler Archfiend]]" that increases LP activated during ?| A = In this case, the Damage Stepeffect of "[[Thought Ruler Archfiend]]" is not activated.| cite = 7089| date = 2017-03-24}}

{{Ruling| Q =If "[[Icarus Attack]]" is activated by targeting 2 Psychic monsters, or if "[[Icarus Attack]]" is activated by targeting 1 Psychic monster and 1 Spell/Trap Card, can the effect of "[[Thought Ruler Archfiend]]" be activated in Chain?| A =OCG The effect of "[[Thought Ruler Archfiend]]" can be activated when a Spell/Trap Card is activated that targets only 1 Psychic monster.<br />The effect of "[[Icarus Attack]]" targets 2 cards on the field, and even if it is activated by targeting 1 Psychic monster and 1 Spell/Trap Card, it is not considered as being activated by targeting only 1 Psychic monster.<br />Therefore, the effect of "[[Thought Ruler Archfiend]]" cannot be activated in Chain to the activation of "[[Icarus Attack]]".| cite = 12531| date = 2017-03-24}} ==Previously Official Rulings=={{Previously Official Rulings |UDE's Rulings =*You can activate this cardchain "[[Thought Ruler Archfiend]]'s negation " effect during when a [[Psychic]]-[[Type]] monster in the Graveyard is targeted. * "[[Thought Ruler Archfiend]]’s" effect can be activated during the Damage Step. ===Judge List Rulings===* "[[Emergency Teleport]]" does not target. So "[[Thought Ruler Archfiend|Thought Ruler Archfiend's]]" effect cannot be [[chain]]ed to "[[Emergency Teleport]]".<ref>[http://yugiohweb.archive.faqorg/web/20090212102051/http://entertainment.konamiupperdeck.jpcom/COMMUNITY/forums/thread/EokpControl?&lang=en&tid=43777&event=FE0006 Konami FAQ1407193.aspx UDE Judge List]: Synchro Monster > Thought Ruler ArchfiendVs. Emergency Teleport.</ref>}}