He figured that rarity would be a balancing factor because if you only buy a few packs and get cards through ante and a few trades, how can you get more than one, maybe two of any rare
Just remember to do your lifegain on your turn, and pack in the graveyard hate to make sure you aren't helping another deck
I tend to put it in every deck that I can, but I appear to be out of step with the rest of the EDH community (at least as it is represented by r/EDH)
WASHER AND DRYER SAFE: Machine wash cold separately using a delicate cycle and mild detergent
Tophs second ability lets you earthbend 2 at the end of your turn, turning a land or artifact into a 2/2 creature that comes right back to the battlefield if its destroyed
You need to add quite a few Madam Mims before you can start to see the benefit of bounce, which makes the few you do have feel more like a liability than a strategy