Talk:Semblance/@comment-77.146.87.102-20151001010838/@comment-4010415-20151001014009

I don't think it would be a limitless resource, considering Semblance is a manifestation of Aura, and people don't have a limitless amount of Aura. So, they would only be able to produce fire with their fire Semblance for as long as they have enough Aura to fuel their Semblance.

I think Weiss would need to have an absolutely monstrous amount of Aura to create a glyph the size of a city. She doubled over panting just making enough glyphs to take Ruby up the side of a cliff. Granted, this was after she used a glyph to force ice Dust into the shape of a curved wall to catch the Death Stalker's stinger, then used another glyph to pull Nora out of the way of the Death Stalker, then used a few more glyphs after the giant Nevermore broke the platform Team RWBY was on, then yet another glyph to hold Ruby back on the slingshot and then launch her.

They have to be careful how much Aura they use.

Yang especially has to be careful, since her Semblance involves her purposely taking hits to build up her power. She has to be careful about how much she allows herself to be hit. She's effectly letting her opponent whittle away at her armor, and once that armor is gone, she can actually get injured and be killed.