I'm actually considering the whole part of making the Avá (Guaraní) as a civ... I was getting some interesting ideas; mostly centered on the whole interesting and artistical interaction with Jesuits too. The whole thing of using Guarani, was because Guaraní actually means Warrior anyway.
So yeah just to leave that open, might as well change it to Uybassy.
Just to scribble the idea, this is almost how I would picture the Avá:
UA: The Land with no Evil: Civilian units that enter your territory have a chance of becoming yours. Chance increased depending on the cultural influence. Receive a free Great Work of Music or Art slot in cities with a Mission.
UU: Something (Probably Guaraní, given its meaning
): Most likely a Crossbowman replacement that doesn't require Machinery so comes earlier, has +1 Range but also is weaker.
UI: Mission: Built by Missionaries it consumes the missionary when built. May only be built on Jungle and not adjacently to another; +3 Culture; +1 Culture after the discovery of Accoustics.
So... I know Missions are actually a colonial thing; but the ones built with the help of the Guaraníes are also impressive; and also an interesting way for developing a special culture; it also generates interesting interaction. However, I might do this later on; I'm making too many UIs lately... (though really, its the best way to do so with most Native American, that or UU)
The UA will mostly get Prophets, Missionaries and Musicians; so it goes well with the theme too.
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I suppose the WLTKD thing is true, but its also a very unused mechanic in existant civs, so I consider its not an issue...
Anyway... I need some help finding good music for the Tupi... Specially since its possible I end making up the Guaraní; I had already some good Guaraní options chosen... So, if anyone finds something good enough, it will be nice.
Also... what would be a good capital for the Tupi?