Limitation at buying Troops???

[Quikpik]

Yes, you may run out of a certain type of troop. But that doesn't mean there will be no more monsters to buy for your army. For example, I had polar bears for awhile until they slowly died off after many battles. I then switched to regular bears, which between all the different vendors that sold bears totaled over 3000 available for purchase.

Buy the game, it's great.