mtg black dragon cards Necromaster [Dragons of Tarkir] Dragon Skeleton Skanos, Black Dragon Vassal —

I also like the implications of having three of the four cards involved only matter for their type

How about copying BloodthirsterBloodthirster, or Dragonhawk, Fate's TempestDragonhawk, Fate's Tempest

17 The War Doctor Do No Harm Turned Into DoLots Of Harm An incredible commander with a huge amount of potential, The War Doctor takes time under his control to deal an obscene amount of damage turn after turn

Creatures your opponents control get -1/-1 until end of turn

These cards commonly interact with your opponents with at least one mode, though thats not a universal truth

Cogsworth Illuminary Watchmans existence ups his playability quite a bit