Currently, the only building Alex can upgrade is the Barracks, as the castle still lacks some iron ingots, and special buildings cannot be upgraded either.
Who cares, money is meant to be spent.
[Upgrade Barracks Required: 8000 magic crystals, 80 Essence Shards]
"Upgrade!"
[Undead Crystal: lv6 (Unique Barracks)]
[Level 6 Barracks can summon: skeletons, zombies, specters, death conquerors, gargoyles, bone dragons, ghost dragons—six major troops (random twenty) with a 6% chance of summoning high-level troops, and an extremely low chance of summoning a Race King.]
[Upgrade Barracks Required: 10k magic crystals, 100 Essence Shards]
[Congratulations Lord, you have successfully upgraded the Barracks to lv6, rewarded with a random special structure blueprint.]
Huh, lv6 Barracks didn't unlock new troops, but the number of troops summoned increased to twenty.
