Spider Spawning | Art by Daniel Ljunggren These types of decks are able to exist, and thrive, solely because of the many powerful flashback cards in Innistrad , most notably Spider Spawning
You ignore those targeting requirements if those spells aren't bargained, and you can't bargain those spells unless you can choose the appropriate targets
This just seems like a teetering house of cards of a price, but it shows no signs of stopping anytime soon
There's no limit on the number of ongoing schemes you can have face up in your command zone, and having one or more ongoing schemes in your command zone doesn't stop you from setting a scheme in motion at the beginning of your first main phase
For just one mana, the Doctors mechanical mutt adds a nice layer of protection to all of your other legends, while also giving you the option to slip them through the enemy lines with his activated ability
The beefy body and Lifelink are just bonuses at that point