Lifegain strategies are among some of the most popular ones in any format, and Commander is no exception
Not hard to pull off while significantly reshaping the boardstate
Bouncing a damaged Kronk or The Prince, Never Gives Up can be a great way to heal them so they can be played again, while bouncing a shifted Hercules or Cinderella will always give you two cards back, and even allow you to add one of them to your inkwell if you're in a position to play the Floodborn card for full price
It even packs Crucible of Fire and Crucible of the Spirit Dragon
Its great because the twist is more card advantage and value, which makes the otherwise dull strategy more interactive and interesting
Of note, though, you do need to keep a creature around for it to work each turn