Runner of the Sewer-Maze

Riot (This creature enters the battlefield with
your choice of a +1/+1 counter or haste.)
"The Sewer-Maze stretches an almost infinite distance under even the lowest of Golgari dwellings. You'd be hard pressed to get through there without a guide. Lucky for you, I'm the
best guide to ever make it out of that rubble-hole alive. Follow me."