User blog comment:Smartguyc/Jackknife deck/@comment-1755882-20140330013631/@comment-6881157-20140331141639

They are situational because you can force the opponent to use them before you use your impact. It might mean holding back on your impact for 1 turn but that's a minor set back. Wall Lizard is extremely situational when talking about impacts. You have to use it during the battle phase. Your opponent can adjust their plays accordingly.