1 Oct 2005
The first ability only cares that creature tokens leave the battlefield. It doesn't matter where they went.
1 Oct 2005
Note that Twilight Drover doesn't have any way to sacrifice tokens or otherwise cause them to leave the battlefield.
1 Oct 2005
If a player leaves a multiplayer game, all creature tokens that player owns also leave the game. Twilight Drover's ability will trigger once per token.
1 Oct 2005
If Spirit tokens created by Twilight Drover leave the battlefield, they will trigger its first ability.