Assassin's Bounty

At the beginning of your upkeep, you gain X life
and Surveil X, where X is the amount of assassins
you control.
{u}{u}{b}{b}: Put a 2/2 black and blue vampire
assassin creature token with deathtouch onto the battlefield.
{p/u}{p/b}: Target assassin creature gets +1+1 and
menace until end of turn.