If you want to power up this deck idea and make it more competitive, you need to speed up your mana
Among the popular cards with the dredge effect are: Golgari Grave-Troll
Natural Order This one is fantastic
It's not as good as Skyclave Relic, which is better in the mid or late game and rocks indestructible
Another card that works extremely well with Suspend on your side of the battlefield: They changed how cascade worked in Modern to prevent this type of thing from happening, but there are still a few spells that allow you to exile Valki, God of Lies and bring it back as Tibalt, Cosmic Impostor
The first loves to recite the flavor text to Fodder Cannon whenever given the chance, the second has his Weatherlight Crew deck, and the third has read and remembers the characters from every Magic novel ever printed