strixhaven mtg booster box Magic: The Gathering | Secrets of It is aimed at anyone looking to explore the world of Magic the Gathering and deepen their gaming experience. Secrets of Strixhaven - Play

Part of the reason Cavern of Souls still commands a high price tag despite multiple reprintings is that it's also needed as a four of inclusion in competitive constructed kindred decks

Remember that Standard sets rotate in and out, and sometimes there arent enough, or rather there arent enough complimentary cards to build an indestructible deck

It's not just a collectible item either

It wont stop someone else from taking your creature with a different mind control later since these effects usually overwrite previous ones (something about timestamps)

Rulebook not included.

Pair that with her Ninjutsu ability, and you can turn an unblocked 1/1 flier into 13 damage with a Colossus Hammer in play