If you can give it Trample or some kind of evasion, then maybe we have a combo card on our hands, but thats a lot of extra work to make this more than just a solid, average creature
What are your favorite cards
Carrion Feeder and Viscera Seer are two great examples that can also be returned with Shireis ability, though more resilient sacrifice outlets like Altar of Dementia or Ashnods Altar will work perfectly fine here, too
With The Lunar Whale, you can do that and have a 3/5 flying vehicle thats easy to crew
But when the condition clashes with your gameplan, it poses the question: Is it more beneficial to advance your own board, or prevent an opponent from claiming the Bounty
They play a sixth land and attack you