Lightwielder Paladin

First strike (This creature deals combat damage before creatures without first strike.)
Whenever this creature deals combat damage to a player, you may exile target black or red permanent that player controls.

Archenemy: Nicol Bolas

First strike
Whenever Lightwielder Paladin deals combat damage to a player, you may exile target black or red permanent that player controls.

Magic 2010

First strike (This creature deals combat damage before creatures without first strike.)
Whenever Lightwielder Paladin deals combat damage to a player, you may exile target black or red permanent that player controls.

Lands are colorless (even if their frames have some colored elements to them). You can’t target a Swamp, a Mountain, or any other land with Lightwielder Paladin’s ability (unless some other effect has turned that land black or red).