Passable damage common, but takes up a lot of space in the deck and demands extra support. It tends to be stronger to have a few Star-spending cards which generate great output from your Stars than the throw tons of them into your deck, which results in Stars being spent on unupgraded cards with less output.
~Free win with Clone, which is cool, just make sure you have a potion/relic for the rare fights which counter it, like the Insects who only take 9 per hit!