Cavalry Master
Time Spiral — uncommon
Creature — Human Knight
Cavalry Master rulings:
2006-09-25: Cavalry Master adds only one instance of flanking per creature, even if that creature already has multiple instances of flanking.
2006-09-25: If a creature without flanking is given flanking by another effect, then this ability will grant a second instance. Similarly, if a creature loses flanking, then it won’t get the Calvary Master instance either.