A little while ago I discovered a card that could render
many decks helpless. It is called Meekstone. It is an artifact that
costs one mana and doesn't let creatures with power greater than two
untap. This card is good with other cards as well. You can use
Glacial Walls, Serra Angels, Twiddles, and creatures with power less than two to
your advantage. Just think of playing a fires deck with Meekstone.
You can stop creature threats with Glacial Walls and drain your opponent's life
with Serra Angel. You can also use Twiddle to tap a big creature you want
out of the way. You might want to use a Plague Spitter to clear away all
of your opponent's small creatures away. You could probably make a decent
deck with this card.
Although Meekstone can have both you and your opponent pulling your hair
out you can be a step ahead of him. Well I hope I have given some ideas to
you. Until next time see ya.