According to the banned announcement, "tribal decks relying on two-toughness 'lords' see very little play, and this (Punishing Fire) is a major barrier to their success." Unfortunately for Merfolk, a decade has gone by, and tribal decks relying on two-toughness lords still see very little play, even though Punishing Fire is banned
Rakdos, Patron of Chaos Rakdos is solid
Gaining life in Commander usually needs to accomplish a goal, which is something that Celestine does well
Jeskai has gotten close to counters a few times, but this is the first contact with +1/+1 counters and charge counters
The first is that it gives your other Rigger creatures +1/+0 and haste, and the second is the more infamous ability of doubling up on assembling Contraptions whenever one of your Rigger creatures assembles one
So, for many reasons, Zurgo's design makes me very happy