Not only can we immediately upgrade the mana base, but also, now that surveil is an evergreen mechanic, we get more surveil cards all the time (just see the Murders at Karlov Manor surveil lands), which means the deck should continue to improve little by little, set by set
This means that most of the time, you will have a historic spell to trigger one of the abilities I talked about on the cards above
According to the good folks over at MisprintedMtg the number of times this has occured can roughly be counted on our fingers and toes, and the known sheets where it has happened are French FBB Revised, Fallen Empires, Homelands, Weatherlight, Mirage, 4th Edition, Ice Age, Japanese Shards of Alara, Battle for Zendikar, Eldrich Moon, Magic Origins, Dragons of Tarkir, Amonkhet, Commander 2020, Jumpstart, and M21
Declaration in Stone: I need to do the math when I play this to determine how good it is to use against an opponent or to use it on my own creatures
At its best, Faithless Looting dumps precious value into your graveyard for you to reanimate at your will
