Changes to Game Mechanics to be applied with Master Rule (1 April 2020 Revision)
Changes to the way certain effects are resolved will be applied on 1 April 2020 together with the Master Rule (1 April 2020 Revision). Here are the changes that will be taking effect.
Edit: Updated with screenshots from Duel Links which provides additional examples and clarifications.
1. Regarding the Activation of Monster Effects for Monsters Returned to the Deck or the Extra Deck Face-Down
Unless it is specifically stated in the text, monsters that are returned to the Deck and the Extra Deck face-down cannot activate their effects (this includes mandatory effects).
2. Regarding the Activation of Card Effects that Move Away from Their Activation Location Before Their Effects Activated
In card texts, cards refer to their effect activation requirement as well as their effect activation location. (For example, if it is an effect that activates when the monster itself is Normal Summoned, it activates on the field, if it is a Trap Card whose effect is activated if it is sent to the GY, it activates in the GY.) If a card moves location from its activation location to a different location before its effect is activated, its effect cannot be activated (including mandatory effects).
3A. Regarding the Normal or Special Summoning of a Monster in Relations to Card Effects that Mention “During the turn you activate this card/effect”
Some cards will have text such as “During the turn you activate this effect, you cannot Special Summon monsters, except [●●●] monsters” or “During the turn you activate this card, you cannot Summon monsters, except with this card’s effect”, which have activation requirements for whether or not you Summoned certain monsters during the turn. Cards with this text will now check whether or not the Summoning of the monster described in the text was successful for their activation requirements.
3B. Regarding the Special Summoning of Monsters that Mention They “Can only be Special Summoned once per turn”
Certain cards have the text “You can only Special Summon [●●●] once per turn” which means that you can only Special Summon card(s) with that name 1 time during this entire turn. Cards with this text will now only count the Summoning if the Summoning of a monster with that name was successful during the turn.
4. Regarding Continuous Trap Cards that Special Summons Themselves to the Monster Zone by Their Own Effects
Continuous Trap Cards such as “Embodiment of Apophis” which has the effect “Special Summon this card as a Normal Monster (Reptile-Type/EARTH/Level 4/ATK 1600/DEF 1800). (This card is also still a Trap Card.)” that can Special Summon themselves to the Monster Zone will now free up the Spell & Trap Zone they were placed in before.
The in-game English translations has an error for *Point 2, it should read:
If “Embodiment of Apophis” is negated, it will be placed face-up in the player’s Spell & Trap Zone.