Purgatory is clearly illuminated in Scripture as are indulgences. Your unwillingness or inability to see what is present is more a function of your Protestant perspective than scriptural content.
Purgatory is poius fiction. It is no where mentioned in the Scripture.
"Heaven" refered to 277 times
"Hell" is refered to 162 times
"Purgatory" is never mentioned. You claim it is alluded to. Why would Jesus and the Apostles only "allude" to something so important - while they clearly taught us of the reality of the existence of Heaven and Hell?
"Other things not mentioned in the bible: trinity,"
Matthew 28:19
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
"salvation by faith alone,"
Ephesians 2:8
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
Luke 7:50
And he said to the woman, Thy faith hath saved thee; go in peace.
"revelation only contained in Scripture"
We don't contend that.
Psalm 19:1
The heavens declare the glory of God; and the firmament sheweth his handywork.
"denominationalism"
I Cor 11
"I hear that there are divisions among you. And I believe it in part, for there must be factions among you in order that those who are genuine among you may be recognized. "