This works because state-based actions are not checked until the spell has resolved, and so there is no opportunity for the owner of the commander that was destroyed to then send that commander back to the Command Zone their first opportunity to do so is after the spell resolves
When you pair them with cards like Eternal Witness or Mystic Sanctuary, they become engines for complete control
The process is repeated until all of the cards in each single pack have been chosen, then the second pack is opened and the same process continues until all three packs have been used
If you're playing a commander such as Prosper, Tome-Bound or Eruth, Tormented Prophet, it won't even be hard to just cast this from exile for 3 mana
I tested and ultimately cut Reflections of Littjara: it costs too much mana, isn't a creature, doesn't generate immediate value, can't copy legendary creatures, and would get far more hate than it was worth
2 Ultra Ball 150/172: North America Championships (Staff Promo) $110.00 The Ultimate Champion Speaking of North America, there's another valuable Staff Promo from a North American event to appreciate, but this time the focus is on the Ultra Ball again