Mongols; The secret history of the mongols (national epic). Probabilty to be randomly written when expending a... GG 0%; GM 0%; GE 0%; GPr
20%; GSc
10%; GSt
40%; GA
30%. Effect: +1 production in stables.
Mongols; Epic of Jangar (heroic epic). Probabilty to be randomly written when expending a... GG
25%; GM 0%; GE 0%; GPr
5%; GSc
5%; GSt
5%; GA
20%. Effect: +2 EXP in stables.
This could also be used for several effects in different eras:
Poland;
Bogurodzica (heroic epic). Probabilty to be randomly written when expending a... GG
5%; GM 0%; GE 0%; GPr
30%; GSc 0%; GSt 0%; GA
10%. Only possible to build before entering Renaissance. Effect: +1 commerce in churches (or could that be +2 EXP for new units?)
Poland;
Rozmowa Mistrza Polikarpa ze Śmiercią (national epic). Probabilty to be randomly written when expending a... GG 0%; GM 0%; GE 0%; GPr 0%; GSc
10%; GSt
5%; GA
30%. Only possible to build before entering Renaissance. Effect: +1 culture in theatres
Poland;
Mikołaja Doświadczyńskiego przypadki (heroic epic). Probabilty to be randomly written when expending a... GG
5%; GM
10%; GE
10%; GPr 0%; GSc
5%; GSt
5%; GA
40%. Renaissance required, only possible to build before entering Industrial Era. Effect: +1 science in barracks
Poland;
De republica emendanda (national epic). Probabilty to be randomly written when expending a... GG 0%; GM
10%; GE
10%; GPr 0%; GSc
10%; GSt
25%; GA
5%. Renaissance required, only possible to build before entering Industrial Era. Effect: +2 espionage in sejmik
>>>NOTE, there can be only one epic of one kind at any time. If, for example, a heroic epic was already built; there is either zero possibility of a newer epic; or the older one will be replaced by the newer one.
Also note: The epics I linked above for Poland, are certainly not THE epics of Poland; nor are they polish EPICS. They would rather fulfill the role of contemporary works that could be used to randomly pop up as historical and cultural nods.
Now, when I think about it:
Greece; Odyssey (national epic). Probabilty to be randomly written when expending a... GG
25%; GM
10%; GE 0%; GPr 0%; GSc 0%; GSt
25%; GA
40%. Only possible before researching Ethics. Effect: +1 gold in harbors
Greece; Iliad (heroic epic). Probabilty to be randomly written when expending a... GG
25%; GM 0%; GE 0%; GPr
5%; GSc 0%; GSt
25%; GA
40%. Only possible before researching Generalship or Engineering. Effect: +1 culture in barracks
Greece; Anabasis (heroic epic). Probabilty to be randomly written when expending a... GG
40%; GM 0%; GE
10%; GPr 0%; GSc
10%; GSt
40%; GA
5%. Only possible after researching Generalship or Engineering. Effect: +2 EXP in barracks
Greece; Letters of Paul (national epic). Probabilty to be randomly written when expending a... GG 0%; GM
10%; GE 0; GPr
80%; GSc 0%; GSt
10%; GA 0%. Only possible after researching Ethics. Effect: +1 espionage in religious buildings