unlock: large tower
large elf tower. ranged units positiond atop the tower have greater range and sight.
解鎖：大型城塔
精靈族大型城塔。位於塔頂的遠程部隊將擁有最大射程與視野加成。
unlock: small tower
small elf tower. ranged units positioned atop the tower have greater range and sight. shorter than the large tower, reduces to ranged unit.
解鎖：小型城塔
精靈族小型城塔。位於塔頂的遠程部隊將得到略遜於大型城塔的射程與視野加成。
unlock: stone citadel codex
stone citadel codex enables stone gatehouse and tower.
解鎖：石城堡寶典
允許石城牆與城門建造城塔與城門樓。
unlock: archway
builds a large archway to replace this gateway. all gateway upgrades such as hoarding will removed.
解鎖：拱門
建立一個更堅固的大型拱門來替代原本的城門。
unlock: haven
build a second large layer of protective stone walls around the outside of your stronghold. after the walls are complete, if you have a second layer of vine curtain walls, they will be removed.
解鎖：庇護所
建立第二道石製城牆來保護你的領土，如果原先已建造外圍藤蔓城牆，它們將被移除。
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