I have a lot of lands

Im making a somewhat jokey deck thats gonna be just having a ton of lands and not much else. Using Omnath Locus of Creation for the commander. I was wondering if there are any cards that can let you turn yoyr lands to creatures easily or let you block with lands. Doesnt have to be tournament legal as its just a joke deck for me and my buddies. Any advice and help is appreciated. Also other recommendations are welcome too.