If you can copy it, it kind of becomes worth the mana investment, except you could just play a card that was worth what you're paying in the first place, and copy that
This is a fantastically flavorful reprint for Duskmourn, and also, believe it or not, a $10 card
After playing it for some time during the closed beta and liking the game I decided to let it rest until the end of the 2018 League of Legends World Championship and give it a week stress test of the game and really take a look how they are molding the game as an esport
Abomination of Llanowar Animate Graveyard Apocalypse Demon Bloodsworn Knight Boneyard Mycodrax Boneyard Wurm Candlekeep Inspiration Consuming Aberration Consuming Blob Elephant Resurgence Graveyard Busybody Leonardo da Vinci Lumra, Bellow of the Woods Melek, Reforged Researcher Nethergoyf Old Stickfingers Revenant Seize the Storm Sewer Nemesis Souls of the Lost Splinterfright Sutured Ghoul Svogthos, the Restless Tomb Textbook Tabulator The Capitoline Triad Titania, Gaea Incarnate Umbra Stalker Unlicensed Hearse Urborg Lhurgoyf Wrenn and Seven
Gran-Gran loots and makes your spells cost 1 less, Accumulate Wisdom draws a whopping three cards for 1 mana most of the time, and Combustion Technique becomes a stellar removal spell
I could see 1-2 copies becoming the norm