A silly question, but...

[legoman727]

Where the heck is the mulligan button for games? No, Shandalar, I do not want to keep a hand with just one land in it.

[jiansonz]

Shandalar uses the old mulligan rule. You can only mulligan if you get no lands or all lands (and if one player takes a mulligan, the other player also gets a chance to do it, regardless of their hand).