Æther Mimic- Fixed, thanks
Æther Striker- Same
Defiant Voyager- As of 2014, the word "unblockable" has been abolished from the magic vocabulary. for example magiccards.info is a great site because it shows to the right of the cards not what is written, but what it is translated to in modern day English. This is basically what I say when I say syntax errors. It is not really big, but I prefer to stick to it. If you are wondering why all of Theros and Born of the Gods said "can't be blocked" this is why, maybe unblockable was just so obvious, so no reminder text was needed, but would also confuse new players. I suppose you are right that that reminder text is unneeded though.
Delayed // Effect- I made them reveal it because it just prevents sneaky cheating like putting the wrong card down, its just like why any specific search card makes them reveal it- to make sure its a legal target. I would have simply said "Put that creature on its owners library instead" but that would cancel all the wonderful trigger creatures I made in the set. Also, I forgot to say this but there was no option to give it fuse, so I plugged it into the unneeded P/T box.
Young Æthersworn- Fixed
Thanks for that my friend, you have a keen eye for error!
(Changes will be uploaded within the hour.)