Yes you need the 3 seals. the end result is..
Diamond Studded Coldain Historical Seal
Lore grp: Coldain Historical Seal
Aug slot 7,8
Ac 14
Str+7 Sta+7 Wis+7 Int+7 HP/Mana/End +70
Sv all +7
Regeneration +7
Avoidance +15
Slot: HEAD ARMS WRIST HANDS CHEST LEGS FEET
recommended lvl of 65
Al