Jace, up to that point, was milling opponents to death, so we made sure he could do that
The game has various sets, such as Rise of the Floodborn and The First Chapter, each introducing new cards and themes
In some unusual cases, Comet may gain loyalty abilities other than the one he normally has
Especially if you can ramp to these on turn 3, theyll provide an incredible defense until they grow to game-winning size (also try giving them evasion with cards like Temperamental Oozewagg or Meteoric Mace)
Black is also a better color for this sort of threat than green, due to having better interaction
Enchantments and creature abilities will help get the tokens battle ready and a few of the creatures power and toughness depend on the number of creatures/humans in play