Short answer- the reason for the auto-lose when no cards are left is to avoid infinite games.
If both players have no cards left to draw and both players can not damage enough to kill the other player, then it would be a matter of seeing which one logs off first. That situation should never come up if at all possible in this game as it stands.
Please read my previous posts.
I'm hooked on this game, but this one "feature"
Wait, feature? All major CCG have that rule.
Nothing new to add to what everyone said.
So is your answer really "because everyone else is doing it, we should do it too"? Lame.
Eva, allow me to share with you my strategy. I use life creatures, and I have 6 forest spirits in my deck. They start off very, very weak (1/1) but can be increased in strength without limit at +2/2 per turn. Thus, at the start of a game my hand is very weak, but by the end is incredibly powerful doing 50, 60 or more dmg per turn. With all 6 in play thats +12/12 dmg every turn. I also use a thorns sheild to kill opponenets creatures, however this is also a long term strategy as it takes several rounds to bring down a creature, but eventually always will.
There are a few weakness that can be exploited. A fire sheild for instance is instance death to any new spirits I play. Likewise a weight sheild will stop all dmg from me at the end of the game. Theres a few other cards as well that can seriously hinder my strategy, and for these I keep a few "defragmentation" (I think thats the name) cards in my deck as well. However, if I get a bad shuffle it's possible that I'm unable to play most of my hand until near the end of the deck. For instance, I'll need to wait for a fire pendulum card to appear before I'm able to destroy the opponents fire shield. And if they are all at the end of my deck, I'm sol.
Thus, there are times where I'm forced to wait before I begin increasing my power. In these instances it's entirely possible that I run out of time before I can kill my opponent, even though I'm in no immediate danger of dieing. (6 heal cards + a thorn shield and a druid staff will keep you alive for a suprisingly long, long time).
I suppose the problem is that my strategy is a long term one, and this game doesn't lend itself well to long term strategies. Once the deck is out, the game is over, therefore no strategies allowed that go for longer then your deck.
I'm able to win about 75% of the lvl 5 matches I play using this strategy with nearly 0 upgraded cards (i havent' been playing that long). It's just frustrating when I've survived the worst the AI can throw at me, am finally able to start rocking and rolling and BAM the game is over even though my creatures would easily win.