Consider your Capital to be like your credit score; destroy anyone who prevents you from getting it higher... Or, do the American thing, and ask; "How can I make other people do it for me?".
This is my favorite card thus far. seeing how resources is the bread and butter of this game, and having a creature that can give you +3 of it in a blink of an eye, with a small cost of capital, makes him a very valuable part in any deck. I highly recommend to add him in any deck format
Considering that any good deck has a fundamentally sound draw mechanic, this card is consequently the best resource producing territory in the game at the moment. I highly suggest you consider playing 2-4 copies of this card in EVERY deck!