I like the set-up although I wouldn't straight up steal a riddle from the Hobbit, it's too much of a gimmie.
I think I'm OK with that. The player may have been named after a character from LotR, but I'm not sure she's got every little detail from the books memorized. She may not remember that little riddle. And even if she does? Meh. It's not really meant to be hard. It's meant to be a riddle that her character probably *would* know, given her family history.
That being said, if anyone's got a better idea, I'm open to alternatives.
Does it make sense that her ancestors would have put a minotaur skeleton down there?
I dunno. She's a 4th level PC. There aren't a whole lot of thematically appropriate (or CR-appropriate) monsters in the MM. I mainly just wanted something she would have a decent chance of beating in single combat (but that wasn't a push-over) ... and the fact that minotaurs are frequently depicted wielding greataxes was another draw. It could just be the reanimated remains of a minotaur the ancestor once bested in single combat perhaps. And there could be some lore to that effect in the father's/brother's research.
For a bloodine test, you can't beat drawing real blood, although what should draw the blood is up to you. Thorns are a classic. Perhaps the PC must spill some of her blood on a small altar to some form of storm spirit (which might be confused with a demon if the party is lacking in identification skills, hilarity should ensue.)
I was thinking of skipping the bloodline test, but this is actually a neat idea. I could go with Akadi maybe, the air elemental primordial. Or, if I wanted to make the ancestor a little sinister, maybe Talos or even Auril. Umberlee fits with Baldur's Gate, but she's more to do with watery storms than windy ones. I could also work in the little phrase my wife came up with: "Blood of my blood, breath of my breath". Maybe she needs to cut herself and put a few drops of her blood in a censer and then blow on it to make it burn away as smoke or something.
As far as the Axe goes, maybe the Spirit imbues it with the Vind rune if you're a fan of the latest Unearthed Arcana. That even gives the PC the opportunity to pursue a PrC related to her families legacy. (And makes her the potential target of other would be Rune Lords trying to complete their "gather a rune" quests.)
Some of those simple properties for the vind rune are pretty neat. I'm not sure I want to go the rune magic route, especially since it's still essentially a playtest idea, but I might steal a property or two for the axe.
I'm thinking combine a few ideas.
1) Party goes for the quest to the Crypt, battles undead, sees a statue with open hand. (Greataxe is a key)
2) Secret door to tomb opens but the Greataxe is returned without the door closing.
3) Puzzles and challenges leading up to boss fight (Minotaur)
4) However in the FINAL chamber, a force field blocks all but those who are able to prove their bloodline.
5) Other PCs can watch as the Fighter solves the final puzzle.
6) The is a better statue in a similar pose to the first one outside, but this room is filled with all kinds of axes. Again the PC should (hopefully) figure out that the easy answer is right, she's already holding the axe. Her axe gets a magical upgrade, with potential for future upgrades, ancestral visitations etc at key points in the story to unlock more power.
Hmm. Maybe. That's kind of what I was going for with the
gust of wind corridor. I'm anticipating that the fighter will be the only one to successfully get through it, but there is a possibility that the others might as well (especially since the druid is both a goliath and can turn himself into a bear).
As for the weapon, you reckon I should go with upgrading her existing weapon rather than replacing it?