That said, let's get into those aforementioned characteristics
It is likely to rely on one of your opponents having worthwhile creatures to copy in their graveyard, but the removal available in black will help you to put the right ones in the right place
When these cards enter the battlefield they may only have a basic ability, but they can be powered up, they just need a crew
Even if you cast a spell for its spell-slinging cost, it is still considered to be cast , so The Sixth Doctor will copy them upon cast
As I often explain in my Budget Commander articles, every time I build a rough draft of a deck, I make sure I have a certain ratio of mana, interaction, card advantage, etc
The only real way to kill a walker and feel ahead is to do so by attacking with guys you have in play or a counterspell