yes its from the third ova and no not yet sadly and madoka can be a trap if she wanted too, it wouldnt be weird since she has godly powers she can be a tree if she wanted to be
Yay! But... Balls...
In response to your assertion that Madoka can be anything she wants to be, I will re brand an idea regarding God and omnipotence I saw on the internet that time once; that he can do absolutely anything thanks to his being omnipotent, and that him not being able to do evil because that good is his nature. His nature is not a restriction, and so here that is applied in yuri. Madoka's very nature is yuri, and as such she will not be able to do anything which contradicts this (such as changing herself into anything other than a girl). Therefore, she is unable to do change into a man, however this isn't a restriction to her godliness as she is by her very nature yuri.
And God damn, you made me think of the cosplaying traps manga again.
This is the last time I reply to this chain Nezchan, I swear, please don't hurt me!