Talk:Trundle/Strategy/@comment-4006117-20110821104501/@comment-98.220.34.220-20120710225818

The reason you buy both is not to stick to them while they run... It's to keep them from running. You use FM and TF on him because the TF gets you insane damage with your Q. The chance of the Phage slow on TF is often not enough to lock them down before they can escape the contaminate zone, even with the pillar (though you can still stick to them fairly well). This is why you want the FM. I keeps them from leaving the Contaminatated zone guaranteed. After the FM slow, it's also easier to properly place the Pillar of Filth so that it pushes them back into the Contaminate zone (and the slows stack).