Even if this Temple got multiply Modes to choose from, i think that the gem gain for this Card is weak when you compare it with "Merchant". Merchant for example, add 5 gems like the temple, but cost only 1 stock. And one Stock is really the easyst amount of recouce you can gain in this game.
A nice idea would be also to add the holy keyword.
(Ok, i misclicked and created the topic, so i have to say something to improve this card :P )