type=armor
items=minecraft:iron_helmet minecraft:iron_chestplate minecraft:chainmail_leggings minecraft:leather_boots
texture.leather_layer_1=mercenary_layer_1
texture.iron_layer_1_overlay=mercenary_layer_1
texture.iron_layer_1=mercenary_layer_1
texture.chainmail_layer_2=mercenary_layer_2
nbt.ExtraAttributes.id=regex:MERCENARY_(HELMET|CHESTPLATE|LEGGINGS|BOOTS)