So since you're on a Hunnic kick, let's have some odd ones!
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The Hephthalites (Mihirakula)
Start Bias: Plains
Capital:
Piandjikent
UA:
Sveta Huna
Military Units garrisoned in Cities generate a +1%
Military Production bonus in that City for each Puppeted City you control, increasing to +2% if the Puppeted City is a former Capital. All Units may move after attacking.
UU:
Asbarobido (replaces Great General)
Standard Great General abilities. However, any unit with 3 or more Movement Speed gains an increased
Combat Bonus (25% vs. 15%) if both it and the Asbarobido moved at least one tile during the Hephthalite's most recent turn turn. The
Capital generates
Great People +5% faster for each Asbarobido in enemy territory.
UU:
Tokharoi (replaces Composite Bowman)
Though much more susceptible to melee attack than the Composite Bowman it replaces (with a
Combat Strength of 5 rather than a still-pretty-rubbish 7), the Tokharoi is faster, with a base
Movement of 3 and the ability to ignore Terrain Penalties for movement (retained upon upgrading). It also has the unique promotion, "Wusun Vultures", that allows it to gain a temporary +3%
Combat Bonus when attacking per point of yields of the tile it is stationed on when it pillages that tile's Improvement. The bonus is removed on the next turn. Requires Horses and counts as a Mounted Unit.
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How Wusun Vultures works:-
Your Tokharoi is stationed on a Flood Plains tile with Wheat. With a Farm and a Granary in range, that yields 5 Food. If you pillage the farm that turn, the Tokharoi gains a +15% Combat Bonus when attacking that turn.
Your Tokharoi is stationed on a Desert tile with only a Trading Post. Pillaging the Trading Post will only grant a +3% Combat Bonus.
Of course, it'd account for yields from buildings, religions, and the like.
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So, what do you think? I tried to make it a Civ based around destruction and conquest, the rage of the White Huns and the terror inflicted upon their enemies - there's a wonderful quote from a Sassanid source that when Peroz I mustered his army to fight the Hephthalites, they "went forward more like men condemned to death than warriors marching to war". That's the feeling I wanted to capture with this Civ. =]