Based on feedback a few months ago from here, I'm going to use this in conjunction with Donate to 'gift' my opponent some hell! However, one question and I could easily see this going either direction.
When Glacial Chasm enters the battlefield, sacrifice a land.
So, of course when it enters my battlefield, I sacrifice my land. However, once I DONATE it to the opponent and it enters HIS battlefield, does he sacrifice a land as well?
One could argue it does not say enters YOUR battlefield. Thoughts appreciated!