You then get all those lands and can cast all those spells for free
Cid, Timeless Artificer Cid, Timeless Artificer is an interesting build-around that I imagine comes in two flavors: You either go hard on looting, cycling, and self-mill to throw multiple copies of Cid in the graveyard, or you do some Mirror Box shenanigans
Tangled Florahedron is similar
Once you have an army of Defenders on the battlefield, these dorky defenders become real threats to our opponent, dealing damage way above the curve of regular creatures
The deck also runs useful enchantments to trigger delirium, allowing Fear of Missing Out to enable some scary turns as your big fliers get to attack twice
These cards are from Fifth Edition , Deckmasters , and From the Vault: Exiled, respectively