http://gatherer.wizards.com/Pages/Card/Details.aspx?name=Thespian's%20Stage
{tap}: Add {1} to your mana pool.
{2}, {tap}: Thespian's Stage becomes a copy of target land and gains this ability.
My question is:
I use the ability to copy a land. If I copy another land, do I lose the ability of the first copy?
Since it's "gains" and it doesn't say that it loses the previous copy, I think I might "pile" up the abilities.
Also in the case i can gain multiple abilities, if I have as ability {tap} for any color from one card and {tap} for {R} from another card, can I {tap} for any color + {R}?