new sliver card mtg Overlord All Sliver creatures get +1/+1 for each other Sliver on the battlefield. Sliver Overlord

As you can see, your six mana gives you a good sized, hard to answer on curve 7/6 dork with hard ward with sacrifices of legendary stuff only, like your Commander

The main way to visit your attractions is to have a die roll that corresponds to the lit-up numbers on the right side of the attraction

Your eighth colorless card doesnt directly add to your seventh the way Allies does

You can change the Quantity Filter to 0 and it will display all cards with the other filters you describe - usually just by inputting the name into the Search bar

Here are some incentives for it: Cards like Corrupt, Cabal Coffers, Mutilate, and Defile want you to play as many swamps as possible, so their efficiency is maximized in mono-black decks