(It is possible, though, to get commons and uncommons in other slots.) Traditionally, in a Draft Booster, you get ten commons and three uncommons
If you're curious how your mechanic measures up against famous mechanics from the past, you can do the same calculations I just laid out
That particular game released to consoles and PC in August of 2013
To start with, this card is an absurd combination of immediate abilities and stats for 2 mana
When you recast Sol Ring you get a new Thopter token, untapping the Golem and restarting the combo all over again for infinite creatures and mana
It doesn't copy whether that token is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on