On the other hand, Dwarven Thrower does not require any spell to return to the hand of its thrower.
A dwarven thrower does require attunement though, as I recall.
And if I recall returning weapons can be blocked if the physical space doesn't allow for it (that may be 3.5 brain going).
My sig is something witty.
78% of DM's started their first campaign in a tavern. If you're one of the 22% that didn't, copy and paste this into your signature.