Cardcaptor Sakura - Season 3 Episode 18

There is an avalanche that Sakura must stop. She transforms & uses The Time(Which we all know uses alot of magic), The Fly to get to the spot of the avalanche, and attempts to use The Firey(One of the four element cards, also requires ALOT of magic) and faints. The Time's magic then ends and the avalanche almost falls on Sakura, but Eriol stops it. This marks the one and only time Eriol has to assist Sakura with a problem bestowed upon her by himself. Eriol also mentions how the one thing he does not want to do is cause Sakura pain, but it seems as if he can't not cause her pain.