I personally have had play experience with Shackles. And if you ask me (the proud owner of 50+ of them) I think it should be in every deck ever made, but I brought it in against Salvagers. It ended up stalling the game out long enough for me to draw enough counters or stifles to stop him and win (happened in both game 2 as well as 3). And considering it went down to 4 cards game 2... I was quite happy with the out come. Um as for being bad... Pithing needle? As well as artifact destruction more common then enchantment.

