One of the more interesting aspects of the commander format is that if a player accumulates 20 points of damage from a single commander, they immediately lose the game
The rest are either green or colorless ways to ensure that you'll be able to cast the appropriate four-drop on your third turn, and will go a long way towards keeping pace with the rest of the decks at the table
Then, on the next turn, you drop Karrthus, steal all of those Dragons, give them haste, and swing for a bunch of damage to someones face
But the payoff truly varies
However, we believe it is necessary to preserve the overall enjoyment and balance of the game
Search your library for a number of Plains cards equal to the difference, reveal those cards, put one of them onto the battlefield tapped and the rest into your hand, then shuffle