According to my DM a +1 LA means every levels you don't get a level, ex: by level 10 you're level 5, that's way more than 1 level's health so obviously I'm missing something?
yes, you are.Am I allowed to be dragonborn and have the mineral warrior template?
i didn't quite get that but its wrongAccording to my DM a +1 LA means every levels you don't get a level, ex: by level 10 you're level 5, that's way more than 1 level's health so obviously I'm missing something?
so your character with the 18 class levels of your original post +1 LA from the mineral warrior template will be equivalent of a 19 level character.effective character level This number represents a creature's overall power relative to that of a character from the Player's Handbook. A creature with an effective character level (ECL) of 10 is roughly equivalent to a 10th-level character. A creature's ECL is the sum of its Hit Dice (including class levels) and level adjustment. For instance, a splinterwaif has 2 HD and a +4 level adjustment. It is the equivalent of a 6th-level character.
Acquired Template that may be applied to any Corporeal creature other than a Construct, Elemental, or Undead.
So your character type is Humanoid with the dragonblood subtype, therefore the meets the prerequisites to acquire the mineral warrior template because he is not a construct an elemental or undead.Dragonborn are humanoids with the dragonblood subtype and any other subtypes they had before undergoing the Rite of Rebirth.