This is that thing that Joven and Chandler stole from Eron the Relentless
The ability to have a repeatable Heat Shimmer is exceptionally powerful, and the downside of the creature needing to die to copy it is trivial in Commander
Note: You only need to crew Ghost Ark, which means you can use this effect the turn it comes down and dont need to risk it in combat
It fits into almost any deck, and it gives you a second chance at your best plays, whether thats a big creature, a powerful spell, or a key land
Sometimes you dont even want to jump through the simplest of hoops to reap your rewards though
When it comes into play, you get to make two 1/1 Faerie Rogue creatures with flying, which is not bad, but not great given its cost