The finest soldiers aren't worth a whit without a set of hands to lead them and a set of eyes to guide them.

Crimson Honor Guard

Trample
At the beginning of each player's end step, Crimson Honor Guard deals 4 damage to that player unless he or she controls a commander.

Trample
At the beginning of each player's end step, this creature deals 4 damage to that player unless they control a commander.

Crimson Vow Commander

Trample
At the beginning of each player's end step, Crimson Honor Guard deals 4 damage to that player unless they control a commander.