Combined with its colorless nature, allowing it to go into every deck, and the occasional difficulty for inexperienced players to realize that Library is the reason theyre losing, its place on the banned list is very secure
Preventing blockers can enable significant damage to go through, deflecting a targeted spell can handle problematic permanents, and at worst, you can destroy an artifact
Flavor-wise, its a great nod to the Jurassic Park characterusing science (and questionable ethics) to mix species for powerful results
Experienced players generally follow unwritten rules against running mass land denial and focusing on cheap infinite combos, and this bracket largely codifies those unwritten rules
It's on this list because you guys sent a lot of questions
Serras Sanctum adds white mana to your mana pool, and it is based on how many enchantments you control