As it enters the battlefield, you can discard any number of Creature cards
Putting aside the avoidance of choosing suboptimal Commanders for archetypes, the lack of pet cards, and never picking cards for flavor, a B4/B5 player is mathing on gameplan and win conditions, and not on what most players could benefit from considering using math for: getting to enjoy the reason you put the deck together in the first place, commonly known as doing the thing
Rottenmouth Viper Rottenmouth Viper compared to Invoke Despair offers opponent's another way out in discard, but grows to be more and more expensive
Some cards enchant a creature and add a +1/+1 counter, so these are a good starting point
Ive got all thirteen primary Doctors plus The Fugitive Doctor and The War Doctor on the list
The newest promotion coming to TCG Pocket arrives as the game looks to have lots on the way for the coming month