[Battle] Diablo, The Dark Wanderer

The Dark Wanderer 

Boss: Diablo 

Senario: Old Tristam 

Diablo himself walked through the roads of Tristam by his own feet. Despite of he was in a human form, the demonic chaos he unleashed fed the nightmares of both children and old men. It would be awesome fighting Diablo in this scenario (and even better if adding some fire to the town).

Adding fire to the town is a great idea, but it shouldn't be done at first. We should be thrown into Old Tristram as the battle starts, and maybe get a glance of Griswold, Cain, Pipin, etc. For bonus points, throw in a couple of civilians from the houses.

Now, as you start to fight Diablo, he of course has fire attacks. _Make the buildings in the environment destructible_. Watch civilians run for their lives as Diablo lays waste to their city, eventually bringing it to the burned-out environment we see in D3.

The burning buildings should of course deal damage to you, and the fire should spread naturally outward, engulfing other pieces of the environment (bushes, grass, etc) until the map eventually fills up with flame. In terms of the looks of the environment, it'd also be pretty cool if the world started out super dark (as you suggested), but the flames provided more vision as they spread, slowly revealing the fact that the city is being destroyed.

Making this a timed battle gives it some sense of urgency for the player to destroy Diablo before he completely destroys Tristram. If time runs out and you are completely engulfed in flames, you at least get to see the sight of Diablo (who is immune to his own fire) walking around a burning city as you fall to your death and are thrown out of the memory.

You could even provide some tactical strategy to the battle if you gave some kind of extra bonus to the player for each civilian that reached safety. You'd run around and be able to direct Diablo's attacks to lay waste to a smaller portion of the city first (since it's directed at you), and by playing it close with the flames you are limiting where he shoots additional flames, meaning less of the city burns up as fast and more civilians get away. Strategy means replayability, as people continue to play the battle over and over again to best their score (not to mention score more rewards).