Akmeeli, also known in Finnish as Ikämieli, was a Kemi Sámi shaman from Sompio, Northeastern Sodankylä. He is said to have lived in 16th, maybe 17th, century. The population of the area has assimilated into Finns after this point, but the story of Akmeeli continued to live on, and there have been tietäjät in the area who have said to be relatives or descendants of Akmeeli. According to Samuli Paulaharju and Jaakko Fellman, Akmeeli could've been the father of Johan Musta, who was the first person from Sodankylä to be written down in official records (in the 17th century).
There are various stories about Akmeeli among Sámi, Norwegians, and Russians. He is said to have, for example, rallied the Sámi of the nearby areas to fight against Russian guerrilla fighters. However, the most famous story of him is about his death.
When salmon stopped travelling to the local river (Luiro river?), Akmeeli decided to travel as an ide to go see the reason why. In order to do this, he'd need to perform a shaman ritual and fall into a trance. He told his wife when to wake him up; she had to utter specific words.
Unfortunately, when the time came, the wife forgot what she was supposed to say and Akmeeli remained unmoving, in trance. Eventually, his body started smelling and rotting so it was buried onto the coast of Sompiojärvi lake. Thirty years later, she suddenly remember the words, ran to Akmeeli's grave and said the spell:
  Hauin suolen soikerosta Kolmannesta koikerosta Akmeeli Antereeas Paijele jo pajas! |
From the twist of a pike's intestines From the third coil Akmeeli Antereeas Get up already! |
The last line being near incomprehensible to me so I guess some of the words are Sámi.
Akmeeli's rotted body rose from the grave, but it was too late as he said:
| Ei ole miehestä märännehestä Kun ei ole ennen muistettu Jo on polvet lahonneet |
A rotten one cannot be a man again For you didn't remember earlier My knees have already decayed |
And so, his jawbone fell off, and his skeleton crumbled back to the ground.
A wooden cross was later set twice on the assumed location of Akmeeli's grave, despite the fact that he was never a Christian. However, in diggings, no human remains have been found on this little "burial mound" of Akmeeli. The only way for this to have actually been his grave would be if he was not buried but left in a casket onto the ground, which admittedly was a Sámi pagan custom in the area. The hole in the mound, however, has been assumed to have been for wild reindeer hunting.
The local tietäjä Jaako "Polvari-Jaako" Alariesto is said to have visited Akmeeli's grave, asking him for knowledge, and he would've also been the one who set up the first wooden cross for him.
Researchers have pointed out very interesting things about Akmeeli and the Finnish runosong Song of Vipunen. According to several researchers, the last name of the figure Antero Vipunen seems refer to the world pillar and therefore, to the fertility god Virankannos (who I think is the same as Ukko). Similarly, the fertility-related figure Lemminkäinen is called the son of Vipunen. However, "Antero" is clearly a later, Christian name, and the shaman-epic features of the Song of Vipunen have been seen as later modifications as well. As Akmeeli's "Christian name" (though he was never a Christian himself) is said to have been Antereeas, it's been thought that the story of Akmeeli or figures similar to him (even earlier ones?) might have had such a large impact that they would've ultimately strongly shifted the Song of Vipunen for Finns and Karelians from the grave of a fertility figure to the story of Väinämöinen's journey to the Underworld.
Such a large impact seems strange, but tradition does give Akmeeli similar descriptions about trees on his grave as they do to Antero Vipunen, so the theory does have its reasons. Those words of the rotting body are also given to Lemminkäinen in Karelia.