It’s kind of an investment in upcoming troops… we want the number of gems which trigger something to be consistent, AND we have plans for more troops with really cool effects (like Mab). So we’ve upped that number, because 10 is just too easy to get if you build a team around it, and we want the extra effects to be really neat.
We’ll probably rework troops like Dire Wolf at some stage to be a little (lot) more interesting with what they do.