Day's Undoing and Underworld Dreams
Asked by hiddengibbons 2 years ago
I was doing some research and I found different interpretations. Will Day's Undoing cause your opponent to take damage from Underworld Dreams if cast during your turn or does ending the turn prevent the damage?
So this gets to the correct result, but there's one clarification. Triggers don't go on the stack until Day's Undoing finishes resolving and players get priority. However, an effect that ends the turn does make the game miss any triggers waiting to go onto the stack. This is covered in Rule 719.1:
719.1a If there are any triggered abilities that triggered before this process [ending the turn] began but haven’t been put onto the stack yet, those abilities cease to exist. They won’t be put onto the stack. This rule does not apply to abilities that trigger during this process (see rule 719.1f).
Since the draw happens in a separate action from the turn ending, the triggers will be waiting to go on the stack when the "end the turn" action occurs, so they will cease to exist as per 719.1a. They don't go onto or get exiled from the stack. It doesn't change things in this specific case, but triggers do get put onto the stack in a batch once something finishes resolving, even if different actions taken during its resolution triggered those abilities.
Notably, a triggered ability that watches for things being exiled could trigger DURING the "end the turn" action and would be put on the stack during the cleanup step, causing a round of priority to happen then (and another cleanup step afterward). Turn-ending effects can get complicated sometimes.
Caerwyn says... Accepted answer #1
Underworld Dreams will not deal any damage due to Day's Undoing's end the turn effect.
Each time they draw a card, Underworld Dreams triggers and the trigger goes on the stack--this occurs mid-resolution of Day's Undoing. (Rules 603.2, 603.2a, and 603.3). Because these items are on the stack when Day's Undoing ends the turn, they are all exiled before they can resolve and thus no damage is dealt. (See Day's Undoing's reminder text).
603.2. Whenever a game event or game state matches a triggered ability’s trigger event, that ability automatically triggers. The ability doesn’t do anything at this point.
603.2a Because they aren’t cast or activated, triggered abilities can trigger even when it isn’t legal to cast spells and activate abilities. Effects that preclude abilities from being activated don’t affect them.
603.3. Once an ability has triggered, its controller puts it on the stack as an object that’s not a card the next time a player would receive priority. See rule 117, “Timing and Priority.” The ability becomes the topmost object on the stack. It has the text of the ability that created it, and no other characteristics. It remains on the stack until it’s countered, it resolves, a rule causes it to be removed from the stack, or an effect moves it elsewhere.
January 26, 2022 11:35 a.m. Edited.