Let's dive into Obsidian Flames most expensive cards and crunch the numbers the most valuable top 10
If it leaves your library before then, it won't enter the battlefield at all
But more important, its been a lot of fun
If you want to draft, run a sealed event, or open packs with a playgroup, you want the Play Booster Box instead 30 packs of 14 cards, far better cards-per-dollar, and the product the limited format is built around
For fans of both games, this could be worthwhile, but the rate at which crossovers are releasing does start to beg the question of just how necessary this degree of IP regurgitation really is
You might argue that Probe also limits your information in mulligan decisions however I would counter argue that the subsequent information you gain is worth way way more