Wait, so are you talking about a single song, or an entire concept album?
Because I am liking the idea of a concept album based on this, but I think you could take it a step further.
I am talking concept album TRILOGY, guys.
Album 1: Dragons invade, man climbs the mountain for the milk of the tiger, defeats the dragons.
Album 2: The man becomes corrupted, his mere mortal blood cannot contain the pure essence of tiger, and he begins to mentally and morally decay, ruling the landscape from his throne room, destroying all who would oppose him. Meanwhile, a young boy is raised by the tigers. The climax of this album would be an epic and traumatizing tale of how the boy was run down by the tyrants steeds, and left in a comatose state, to be nursed by his tiger mother
Album 3: The tigers wage a furious and bloody war on mankind, and many casualties are lost. The tyrant cannot be defeated by the tigers though, as their milk runs through his veins. Only a man can defeat the king, but no man is brave enough. No man.... has the heart of a tiger... Except one boy, who is in a coma. The kings daughter escapes the castle, to flee her arranged wedding to some ugly lord dude, and stumbles across the sanctuary the tigers have placed the boy in. Her kiss wakes him, and after some dirty tiger sex, he rises up and kills the tyrant in an epic and glorious battle.
Basicly, its the plot to Dragonheart, with Tigers instead of Dragons, with a bit of the Princess Bride and Snow White thrown in for good measure.