There is not much to be said in regard to its strengths, as the card has been a format staple in Modern ever since the formats inception in 2011, and every deck playing mountains basically used to auto-include four Bolts in the 75
Cid, Timeless Artificer Cid, Timeless Artificer is an interesting build-around that I imagine comes in two flavors: You either go hard on looting, cycling, and self-mill to throw multiple copies of Cid in the graveyard, or you do some Mirror Box shenanigans
There are 9 commons (37.5%), 14 uncommons (29.2%), 21 rares (27.3%), and 9 mythic rares (6%) that can be found in this slot
Some appear as characters on foot, such as the Amber Ink type Vanellope Von Schweetz, on the left in the above image, and some as racers in their Sugar Rush karts, such as the Ruby type Vanellope, above right