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Although the Hartmann family accumulated millions of merits over the past three years, exchanging just these two items cost more than 600,000 merits.

This shows that the more precious the treasure, the more exorbitant its cost. However, for the Hartmann family, such an expense is nothing.

In the war between the East Defense Zone and the zombie horde on Lotus Island, the Hartmann family earned not only military merits but also a huge amount of spirit stones.

Their elixirs and magical instruments were settled partly in military merits and partly in spirit stones. In total, they earned over 100 million spirit stones from this military trade.

Most of the money came from elixirs. Based on the profit margin, the Hartmann family's net profit from elixirs was about 70 million spirit stones—and that was only from military trade.