I have played (on the draw obviously) Blackmail and had it be better than a Coercion (they had a land I could take!)
Steels slower pace can make it a good ink colour to pair with sapphire cards, which can provide the extra ink you need to get big cards out earlier, or a faster colour such as ruby, which can provide some faster options earlier in the game
A Zombie who gets +1/+1 for each creature in your grave at a given moment, Jarad has the potential to become a huge powerhouse with enough self-milling
Representing Final Fantasy X's Zanarkand, Ancient Metropolis introduces a new style of land that can be played either as a land, tapping for green in this case, or played as a Sorcery-Adventure
If someone does manage to overload your counterspells and start going wide, you can drop Propaganda and deter them from attacking you
Destroy a land Green is secondary in land destruction along with black