a 40 cards minimum for deck would be good too. And instead of choosing between drawing or power, cards should be usable as resources of their color. One could choose between playing land or drawing an extra card.
Engionicnaut Hero
Dude! You just completed the Engionicnaut Hero achievement in Talesworth Arena: Death Watch and won the Engionicnaut Hero badge and 30 points! Huzzah!