19-Ages End
Age's End (June 2007) - This last "Farewell" set was released just weeks before the Decipher license expired and consisted of 40 promo rarity cards available in a single deluxe box.
Source: https://de.wikibrief.org/wiki/The_Lord_of_the_Rings_Trading_Card_Game
9 to 16 (from a total of 25)
It included the final versions of many prominent characters, some of whom are considered the most powerful than any previously released.