Should you always find yourself paired against combo decks that loop spells over and over, look to cards like Magebane Lizard and Damping Sphere to stop them, or at least provide a meaningful road block
Seven mana may seem a steep price to pay to get 2 or 3 permanents, but usually the total converted mana cost of the cards you are taking from your opponents is much, much more than seven
they have more HP, higher damage attacks, and can poison opponents more consistently, but they require more Energy
Suspend 3 (Rather than cast this card from your hand, you may pay and exile it with three time counters on it
As we know, four is a lot to keep up and is really rather obvious so you find a lot of the time that you will just counter the first thing that you can with it