Finished a gold level hero chest just now, and it gave me a tabard along with a few gems and a summons coin.
The tabard currently is useless to me and only slightly more prized than the single star troop I am about to pull.
Glass half empty cause cracked from being thrown at wall several times. Never drink and play.
UPDATE: **troop
The day will come when you prize that tabbard! No such thing as useless 4* non-farmable ascension materials. I collected such loot for many months before I was able to use any of it.
Let me echo Havok:
The only way you can ascend your heroes and make them truly formidable is with the right amount of ascension materials (like that Tabard).
Let me high-five you and wish you luck collecting the next one! 
P.S. Here’s a chart showing what you need to ascend 4* and 5* heroes:
I would be very happy to take that “useless” tabard off your hands anytime!! 
Sorry, bluenoser, but the president said no tabards until nafta is improved.
LMAO! 