Bone Dragon and Ghost Dragon

Necropolis creatures
Level 1
Skeleton
Skeleton Warrior
Level 2
Walking Dead
Zombie
Level 3
Wight
Wraith
Level 4
Vampire
Vampire Lord
Level 5
Lich
Power Lich
Level 6
Black Knight
Dread Knight
Level 7
Bone Dragon
Ghost Dragon
Towns

Bone and Ghost Dragons are level 7 creatures of Necropolis town. They are recruited from the Dragon Vault.

"Bone and ghost dragons are raised from dragon corpses. Both of these creatures have a ferocious biting attack and lower the morale of enemy units by one when they appear on the battlefield. Ghost Dragon attacks have a 20% chance of aging their targets. Aged troops have the hit points of all their members halved." ^{RoE manual}

Placing Hydras, as well as Sea Serpents and Haspids , or any living Dragons into the Skeleton Transformer will give you Bone Dragons instead of regular Skeletons. But Bone and Ghost Dragons themselves will be turned there into Skeletons.

Aging special ability

Ghost Dragons have aging special ability, which has 20% probability to occur after they have attacked target creature stack and before the stack has a chance to retaliate. It causes maximum health of every creature in the target stack to be halved. The effect lasts for 3 combat rounds, and can only be removed with the Cure or Dispel spell. Additionally, non-living creatures are immune to aging.

When Ghost Dragons successfully ages a stack, any health lost before the aging takes effect remains lost. However, the aging cannot kill the unit, but it will have 1 health left. For example, a Ghost Dragon attacks one Angel and deals 60 points melee damage before the aging occurs. The Angel will have 40 points health left, which is the result of calculation

200÷2-60 = 40

If the damage of the Ghost Dragon would have been 130, the Angel would have had 1 health left, which would have been the result of calculation that is two process:

First. 200-130 = 70

Second. Max(70- (200- 100),1) = 1 .

200 is previous maximum health and 100 is maximum health after aging. Also 70 is remain health after first process (usual process).

If you use cure spell whose the amount of health is 30, the Angel would have had 131 health left, which would have been the result of calculation also:

First 1+30 = 31

Second. Min(200,31 + (200- 100)) = 131 .

200 is previous maximum health and 100 is maximum health after aging. Also 31 is remain health after first process(usual process).

The effect of aging has a multiplicative effect with Wyvern Monarchs' poisonous ability. This means, that the creature stack's health could potentially be quartered.

Creatures immune to aging:

•  Black Dragon
•  Peasant (can be affected by aging but will lose 0 HPs, as Peasants have only 1 HP)

Elementals:

  Air and Storm Elementals

  Water and Ice Elementals

  Fire and Energy Elementals

  Earth and Magma Elementals

  Psychic and Magic Elementals

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Undead:

  Skeletons and Skeleton Warriors

  Walking Dead and Zombies

  Wights and Wraiths

  Vampires and Vampire Lords

  Liches and Power Liches

  Black and Dread Knights

  Bone and Ghost Dragons

 Mummies

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Gargoyles:

  Stone and Obsidian Gargoyles

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Golems:

  Stone and Iron Golems

 Gold Golems

 Diamond Golems

 Steel Golems 

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Mechanicals:
  Automatons and Sentinel Automatons 
  Dreadnoughts and Juggernauts 

User commentary

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Bone Dragons are the only type of dragon that doesn't require any magical resources to recruit. Bone Dragons and Ghost Dragons are often considered to be among the weakest level 7 creatures. They are not as powerful as regular dragons, and do not share most of their features, like breath attack. While Aging can effectively cripple an enemy stack, it is quite unreliable. They are relatively fast, even for 7th level creatures, and have slightly above average attack stat as well, but the lowest defense of a level 7 unit. Use them defensively to clean up Troop stacks in the first few rounds of combat and try to keep them from being overwhelmed as they will falter when they get teamed up on. They also bear the lowest minimal damage for a tier 7 unit, sharing this stat with the Hydras and Chaos Hydras. They are also one of the three flying Necropolis units, the others being the Vampires and Wights/Wraiths, making them good for sieges, especially since the Wights and Wraiths have low stats.

See also:

• List of creatures