Sleeves fit cards 88 x 63 mm (standard TCG card size)
Once you hit 14 cards in the yard, it transforms into Hades, Sorcerer of Eld, which lets you play from the graveyard
This legendary land is highly played in all formats where its currently legal, and coming to Modern is only going to increase its play
As Ravensburger stated in its press release, "Glimmers of pirates and inventors from across the worlds of Disney take center stage in Azurite Sea when Illumineers set sail as part of their quest to repair The Great Illuminary
So your rating is in line with my own experience playing with and against Library
Instead, its ability, Magical Mix, gives it +1 lore for each different type of ink character you have in play