Having flash seems very apt as you never know when the Mysterious Stranger will appear
Each deck has its own featured, Mythic Rare card that uses specific mana colours that the decks are based around: the Green and White Byrke, Long Ear of the Law and Blue/Red Bria, Riptide Rogue cards, as shown below
For starters, some of the MUL cards in Collector Boosters have the halo foil, which debuted in MOM
Its a nice uncommon that allows you to shuffle your library or rearrange X cards deep, where X is the mana you spend
The Lord of the Rings: Tales of Middle-earth Prerelease weekend has passed, and hopefully you were able to get your hands on some Prerelease packs or other sealed product
Sketches, notes, and observations found in an explorers personal journal inspired the glimmers on the cards