Let's say my board is Blade Instructor, Boros Challenger, and Goblin Cratermaker. Can I:

  1. Attack with all three;
  2. Two mentor triggers go on stack;
  3. Stack triggers such that Blade Instructor's trigger goes first, have that target Boros Challenger;
  4. Boros Challenger's mentor trigger targets Goblin Cratarmaker;
  5. Both triggers see a valid target, therefore I end up with 3/1, 3/4 and 3/3?

I'm not sure if #2 actually works - it is possible that Boros Challenger's mentor ability won't trigger because it, at the time it goes on the stack, had no legal target (or does it trigger anyway, just not resolve?).

  • 1
    Whoever downvoted the question, consider adding a comment? Is there something you think could have been fixed?
    – CollinB
    Feb 23, 2020 at 17:55

1 Answer 1


You can only get one Mentor trigger, the one from Blade Instructor.

If a triggered ability that targets something does not have a legal target when it triggers, it will be removed from the stack as part of the triggering process, and you won't get a chance to resolve anything beforehand. This applies to Boros Challenger's ability as there is no legal target when it triggers.

603.3d The remainder of the process for putting a triggered ability on the stack is identical to the process for casting a spell listed in rules 601.2c–d. If a choice is required when the triggered ability goes on the stack but no legal choices can be made for it, or if a rule or a continuous effect otherwise makes the ability illegal, the ability is simply removed from the stack.

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