
Wall creatures you control get +1/+0 and have banding. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)
Fortified Area has 4 printings, first in Legends (1994). EDHREC ranks it #21,435 among Commander cards. It appears most in Pramikon, Sky Rampart decks (512 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.