A single marketplace isnt the whole market, but it sees enough volume to be a strong signal
I personally had many tricks with Relic, but my favorite remains targeting me when I have Murktide Regent to pump it
As a defensive card, it also shines: keep your guys from dying to removal, or reuse a comes-into-play creature
Then there are the times it does almost nothing
Arwen's Gift The Bath Song Bewitching Leechcraft Bill Ferny, Bree Swindler Birthday Escape Borne Upon a Wind Captain of Umbar Council's Deliberation Deceive the Messenger Dreadful as the Storm Elrond, Lord of Rivendell Gandalf, Friend of the Shire Glorious Gale Goldberry, River-Daughter Grey Havens Navigator Hithlain Knots Horses of the Bruinen Ioreth of the Healing House Isolation at Orthanc Ithilien Kingfisher Knights of Dol Amroth Lrien Revealed Lost Isle Calling Meneldor, Swift Savior Nimrodel Watcher Pelargir Survivor Press the Enemy Rangers of Ithilien Saruman the White Saruman's Trickery Scroll of Isildur Soothing of Smagol Stern Scolding Storm of Saruman
Grixis decks also have a solid number of cards that can ping players for damage , like Underworld Dreams or Stormfist Crusader
