Casualties of Math is a nice update on the classic Golgari sorcery
It can be played for only the cost of four ink via its Shift 4 keyword ability, and it also has the helpful Evasive keyword ability
You can also play the Elder Dragon in the 99 as a way to untap lands with Lord Wingrace at the helm, so you can ramp into bigger spells such as Torment of Hailfire for the win
Common features a circle, with one edge around it and a dull, gray color
Liliana of the Veil The best black planeswalker of all time, Liliana of the Veil benefits from a low cost and three versatile abilities that make her very useful in multiple formats - especially Modern
Well, Archivist of Oghma is already a Halfling, but he can be Sawn in Half just the same