Majestic Myriarch has an ability similar to Odric, Lunarch Marshal or Concerted Effort, but on Myriarch it's templated with an intervening if clause. Does it trigger separately for each ability your creatures have, or just once if at least one other creature has at least one relevant ability?
Majestic Myriarch has actually received post-printing, pre-release errata for the ability in question. Its new text is this:
At the beginning of each combat, Majestic Myriarch gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.
This is now the same style of templating as Odric’s ability, with no intervening if clause. It’s only a single trigger and it only checks for the relevant abilities when the trigger resolves.
This change was made for the same reason that you ask the question, as it would have been a very confusing ability indeed if it had stuck to its printed wording.











