the MC is burned to death alive leaving behind a child under her brother's care
If you are looking for a novel similar to silly alchemist, then it would be best that you stop reading.
The empress dies, all the marquis dies, northern mongolien commander dies, twilight (the master of sword city) dies, blah blah to put it simply everyone dies including the cute little horse (killed by pluto) and the life of MC is tragic.
And there 'were' immortals in the past before pluto (god) wiped them out and crushed the path to immortality.
And the MC acquires the phoenix's source thus turning into phoenix himself.
There is no serious romance it's just tragedy after tragedy for the MC.
But it's a super novel which will make you cry. We don't have a MC with cheats like a grandpa or grandma inside a heaven defying ring or bead.
The achievement of MC is all due to his hardwork. And the talent of MC for cultivation is pathetic, but he works hard to stand up against others.
There are no arrogant young masters. Each antagonist is well fleshed out and even more ruthless and brillant than the MC.
There are no gold mine oppurtunities for the MC in the novel.
The female leads have thier own goals and personalities and is willing to undergo scarfices for their goals.
The MC doesn't overpower his mentors or friends throughout the series. And in fact have to put double the efforts than his friends to just reach them.
But his friends does die off which is tragic.
Even his first love Mu Chengxue scarifices her entire memories to save the MC, in return wandering the world not knowing who she is.
And another love interest the ghost girl looses her emotion and is wandering the world after helping the MC.
And even the MC dies only to be saved by prince yan (prince yan also dies fighting demon but got pulled from the reincarntion pool by the MC in return for his life essence using a forbidden spell) and ghost girl.
Betrayal from the sect member who s (he) trusted for the greater good of the sect (although she gets rescued by the betrayed member later, and dies (sacrifices) as an apology and atonement to the mc) .