Board Thread:Off Topic/@comment-25396609-20190630171456/@comment-26397825-20190726134356

I mean, it seems to be that semblances can be used just like your legs. You can walk for ages depending on your stamina, but you don't really notice it until you've been walking for ages. But by the same logic, stressing or trying to more than you are used to is like suddenly bursting into a dead sprint - it tires you out super fast, and all your energy is gone.

Examples of this include Sun trying to pin Ilia with his clones; he could summon three with jo issues before, and do a ton of stuff. However, against Ilia he actually summoned four and maintained them to pin her down, which he doesn't ever do in normal situations.

Then there's when Ruby tried to pick up Penny and move her; it was the first time we saw her trying to move someone else, and so her semblance failed and she ended up dropping Penny. She obviously overcame this by V4 and V5, where she picks Nora and Weiss up with no issues.