Flanking.
Barricade: At the end of your turn, damage the last unit played by your opponent by 1.
Flanking: If this unit is adjacent to only one card: on your Melee row, its end of turn ability is triggered twice; on your Ranged row, gain 1 Armor at the end of your turn.
Barricade: Trigger this ability if the unit has armor.
Audio
Light cavalry, heavy burden!