A common theme for Darkness Type Cards is they they can dish out Passive damage with Poison and the ability to increase damage when certain conditions are met
Introduction In the Pokmon Trading Card Game, there are two formats used at officially sanctioned Play
Non-Legal Unfinity Commanders Ranked #19
Embrace the challenge, harness the power, and seize victory with Runner's Bane
7 Ayara, First Of Locthwain A Mono-Black aristocrats commander, Ayara, First of Locthwain can convert creature deaths into both life drain and card draw
I haven't seen Keruga, the Macrosage much outside of Pioneer and Explorer, but it would be interesting to see how people use it as a companion in Commander