Purestrains prepare the battlefield and Broodlords ensure they can keep doing that, until eventually you have Patriarchs to come and turn their enemy's strength against each other
This puts all of the opponents creatures at risk when they block, and he will be forced to block with more creatures than he would normally, so that he has more of a choice when you activate the ability
While there are only 111 unique Planechase cards, they are about as large as 2 regular cards placed side by side
The game has all cards released internationally from the Black & White expansion ownards, initially with only cards in the Sword & Shield expansion series being playable, with new products being released in periodic updates
While it wont stop untargeted mill, and it cant stop someone killing you with Commander damage if they somehow play a card that says damage cant be prevented, itll stop basically everything else
That will serve you much better in the long run than this hodgepodge of characters that dont really help your strategy