How Legal is DotA 2?

One of my favorite games is Defense of the Ancients ("DotA"), a WarCraft III mod which has enraptured the attention of millions of gamers.  Prior to college, I played a lot of games, sure - my brothers and I had a N64, GameCube, and Xbox - but I had never really been into PC games (aside from SC and CS).

In college, I was so annoyed with my bf (at the time) because he was always playing this silly game called DotA.  Day and night, I would hear the constant clicking of the mouse, lots of curses, and occasional cheers.

All your base are belong to us!

One day, my bf showed me a character that he was using.  "This is Tiny," he said.  I looked at the character on the screen.  It was a small giant made out of rock.  He was SOOOO cute.  My attention was captured.  I watched Tiny stomp around, gleefully squishing creeps unfortunate enough to be in his path.  All of a sudden, he began to grow.  And grow.  And grow until he was the biggest character on the screen.

RAWR I'm Tiny!  The Stone Giant!

That was how I fell in love with DotA.  A tiny rock monster named "Tiny," the Stone Giant, who could grow and become a lumbering rock monster.  How adorable.