A second possibility is that Elsha, Threefold Master is a commander card that won't be found inside the Commander precons which in this case is something there's been recent precedent for
Tribute Labyrinth Wall and Magical Labyrinth to Special Summon Wall Shadow from the Deck, and since its a Warrior with a huge DEF score, you can equip it with Magnum Shield to grant it a huge TK score
I got cocky and never planned ahead more than the turn I was currently in, so it cost me a trophy and a better showing at States where in previous years I had won them back to back
BREAKING June 1, 2026: The Pokmon Company has officially unveiled the full details of the Pokmon TCG 30th Celebration set
Which would you reveal first
Lastly, I would return it to where you can only regenerate one monster per turn, or add a clause to where the monster is summoned in Attack Position, leaving them in a vulnerable state and forcing the player to consider if reviving the monster (at early stages) is worth the potential LP cost of it getting attacked and destroyed again