AtomicPope
Hero
OMG - The Final Word Weapon! That's Fragarach from the 1e Temple of Elemental Evil, the Sworld that Robliar lost. They also appeared in 1e Unearthed Arcana. Very kewl nod to old school.
The Belt of Mountain's Endurance is far stronger than a Belt of Vigor, though - I'm not sure if that means it's overpowered, or that the designers decided the Belt of Vigor was weak.
My minotaur fighter wants the flask of the dragon's breath! Unfortunately, it needs some clarification: what action is it to use the breath (I'd guess minor), and what defense does it attack (I'd guess Reflex).
If it was a minor action I would guess you could only do it once as an encounter power. The text seems to make it at-will. Which seems a bit strong for a level 3 item, unless it took a standard action.
Where do you get at-will from? It explicitly says it's a daily.