Witness is an annoying card, no doubt about it. Its never seems to be a random inclusion card, it often finds itself in a toolbox deck that has 1 of the 5,700 ways to recur creatures...which makes it a big problem to deal with. You kill the engine? They witness it back to their hand. From a casual standpoint, Eternal Witness borders on being a problem card. If it is in a deck, usually that deck becomes very difficult to stop - due to this 1 card. I played it in two decks, and one of those I had to remove them b/c people hated it so much.