As it happens, two of the options I would've given over Champion are Cardinal and Camel.
And since I'm mentioning it, where you put the Fortress I would've suggested something more whimsical or offbeat: Butler, Piglet Pawn, Viking, Eighth Note, Waffle, Noose, Poison, Wrench, Coil, or Emo Starstruck. (Or, put the Infinity as the last icon, suggesting the nigh-infinite possibilities!)
As it happens, two of the options I would've given over Champion are Cardinal and Camel.
And since I'm mentioning it, where you put the Fortress I would've suggested something more whimsical or offbeat: Butler, Piglet Pawn, Viking, Eighth Note, Waffle, Noose, Poison, Wrench, Coil, or Emo Starstruck. (Or, put the Infinity as the last icon, suggesting the nigh-infinite possibilities!)