That nice too hear^^
Yes phoenix is since, i think, version 0.6 in the game. You are on the right track with the altar but you are missing the key item. It is the easiest item but also the hardest item to find in the game. To get it you will need to save up a lot of mysteria coins and visit a shop in town. So it might be currently missable if you spend too much coins for magic spells, if you ignoring the development chest that can give infinite amounts.
You're welcome!
Thanks that one another person also mentioned, i fixed that already.
But i wasnt aware of the lamia one, thanks will fix that as well!