Each of the 36 Play Boosters contains 14 cards, and you're guaranteed to find a Retro-frame card in every single pack
Then you can cast it prior if it's an instant, so if someone goes to counter your Commander when you cast it and you have no counters in hand to counter back, you might draw it
Much like a traditional tutor, the best entomb effects are efficient so you dont spend too much extra mana finding your key card and have as few restrictions as possible
Thats the default, but some blink effects specify whose control the creature returns under
Ideally, youre in Gruul and have three or more targets before you engage in this chicanery, though
Head chef and Fortress Leader Bernard claims the lava waterfalls (lavafalls?) behind him nullify Fire cards Water weakness