Other outlaws you control have
haste (This creature can attack, and as soon as it comes under your control.).
(Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)
When Hellspur Posse Boss enters the battlefield, create two 1/1 red Mercenary creature tokens with "
: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."