Since the Altar turns that one Servo into two mana you're on your way to as many death, sacrifice, ETB triggers as you can handle, plus more colorless mana than you need
As a commander, its very viable even in the competitive EDH realm
As is the case for all creatures with Start Your Engines, Zahur offers a game-ending effect if you reach Max Speed, but reaching Max Speed is a challenge
Your power is mostly on the board at all time, and choreographed to opponents so this is one of the most vulnerable decks to board wipes, even if all your gifts may stay their hand for another turn or two
Chainer doesnt simply stop at giving all your reanimated creatures haste though
Like most Magic: The Gathering cards, the value of Risk Factor depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Guilds of Ravnica Promos)