AA, FA, MR, and SP variants of the same card can have $400+ price differences
Recent GB and GW variants, while a little less potent against BGx, are better against a number of normally poor matchups
You can create a binder in a similar way to Display Boards
The symbol usually represents the theme of the pack
First printed in the Magic 13 Core Set (I remember it well), this version of Ajani Goldmane covers all the White bases, supporting cheap creature aggression with counters, a Flying plus Doublestrike buff, and the pice de rsistance: a -8 ability that summons a huge army of 2/2 Cat tokens - devastating when paired with some robust life gain
Five mana is steep, and is going to be difficult to find a spot for, but winning via combat damage in a deck that can throw down a half-dozen creatures every turn is a very real outlet that needs to be considered