[使用: 工作台]

Polished Reefstone * 6

↓

Polished Reefstone Stairs * 4

[使用: 切石机]

Polished Reefstone * 1

↓

Polished Reefstone Stairs * 1

[使用: 切石机]

Reefstone * 1

↓

Polished Reefstone Stairs * 1