Sacrificing a creature can often come with upside, too: I had an Orah, Skyclave Hierophant deck that made incredible use of this
Patchwork Banner lets you pick a creature type when it comes into play, giving those creatures you control a bonus +1/+1
They also dont stick together any more or less than normal sleeves, which was a big worry I had originally
a cheap threat that draws plenty of cards does wonders, even if it means you need to restrict your mana curve
The end result is that sometimes you come up with a mechanic that requires a volume all but impossible to achieve without breaking New World Order
Each time you bounce a land, you'll need to replay it from your hand on a subsequent turn, which could affect your overall mana curve