Endless Horde

(Start the game with this conspiracy face-up in the command zone)
Attacking Kobolds you control get +1/+0 for every other attacking Kobold.
{b/r}{b/r}: Create a 1/1 black and red Kobold
creature token.
Whenever a non-token Kobold enters the battlefield under your control,
destroy target land.
Kobolds with power 3 or less are unblockable.