Elves

Racial Power
From the base game, Elves lose no tokens when attacked.

Elves get 6 tokens.

There are 11 Elves in the box.

Strategy
As you have no way to lose tokens, you can fearlessly conquer, controlling a region with only 1 for 1 turn. Elves can be used to eat away at your opponents' tokens, with no fear of retribution.

Trivia
The only way to make the Elves lose a token is to have a Sorcerer zap a lone Elf.