I recently started playing a Soul Sisters / Martyr Life deck, and sometimes have problems remembering triggered abilities every time they're triggered.

Whenever another creature enters the battlefield, you may gain 1 life. (1)

Whenever another creature enters the battlefield, you gain 1 life. (2)

Whenever you gain life, you may put a +1/+1 counter on Ajani's Pridemate. (3)

How serious of a problem is it if I forget any of these, possibly repeatedly (depending on environment)?

From my reading of the Infraction Procedure Guide, Game Play Error — Missed Trigger, as trigger (2) is advantageous for me, it's not a warning (or even caution) if I forget them, even if repeatedly. My opponent has the choice of allowing the triggered ability to be put on (the bottom of) the stack when I remember them at some later point in time:

… the opponent chooses whether the triggered ability is added to the stack. If it is, it’s inserted at the appropriate place on the stack if possible or on the bottom of the stack. (IPG)

From the wording of triggers (1) and (3), I assume they are considered to have a default action (not taking the life gain/counter), and forgetting about them just means I don't get their effect (Comprehensive Rules 603.5):

If the triggered ability specifies a default action associated with a choice made by the controller (usually "If you don't ..." or "... unless"), resolve it choosing the default option. (IPG)

Is my understanding of the rules and how they're handled in a tournament correct?

  • You might want to consider playing a different deck if you find that you consistently miss triggers with Soul Sisters / Martyr Proc. – Hao Ye Jan 20 '15 at 23:28
  • @HaoYe I'm fairly sure that'll fix itself with some practice. I've started MTG again after several years in December, and only played about five games with this deck so far. However, there's a Modern tournament I'd like to attend in two weeks, hence the question. – Daniel Beck Jan 20 '15 at 23:31
  • You can also try some practical strategies to remind yourself. For instance, make some card-size tokens with the trigger text and a big numerical indicator. Place these in the middle of the battlefield between yourself and the opponent. Since players generally place creatures that entered the battlefield near the center, the added visual cue might help. (and then update the number as you play additional copies of Soul Warden/Attendant) – Hao Ye Jan 20 '15 at 23:35

Your understanding of the missed triggers is correct. Since the required triggered ability (number 2) is only beneficial to you, there is no penalty for missing it.

The other triggers do not work exactly how you think because they are covered by a slightly different part of the rule than you quoted. The first part of rule 603.5 says:

Some triggered abilities' effects are optional (they contain "may," as in "At the beginning of your upkeep, you may draw a card"). These abilities go on the stack when they trigger, regardless of whether their controller intends to exercise the ability's option or not. The choice is made when the ability resolves.

Those abilities always go on the stack and they do not have a default choice, so you must make the choice when they resolve. If you do not, it is a missed trigger like any other.

  • 1
    Your Kavu Predator example is incorrect, the board state is not evaluated when determining if a trigger is beneficial or detrimental. Though if you are intentionally 'forgetting' your triggers because of the Predator you could get a DQ for Unsporting Conduct - Cheating. – diego Jan 20 '15 at 19:35
  • @diego This is "The controller of a missed triggered ability receives a Warning only if the triggered ability is usually considered detrimental for the controlling player. The current game state is not a factor in determining this […]", correct? – Daniel Beck Jan 20 '15 at 19:36
  • I've removed that statement. – murgatroid99 Jan 20 '15 at 19:37
  • @DanielBeck Yep, that's correct – diego Jan 20 '15 at 19:37
  • @diego and murgatroid: Thanks to both of you! – Daniel Beck Jan 20 '15 at 19:40

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