Once per turn, during either player's turn, when exactly 1 DARK monster you control and no other monster(s) would be destroyed (by battle or by card effect) or targeted by a card effect, you can banish 1 DARK monster from your Graveyard instead
Beyond the obvious bear typal builds, you can give it cascade with Imoti, Celebrant of Bounty, you can use it to keep your ferocious, formidable, and other power-matters abilities online, and you can discard it when you cast your Indominus Rex, Alpha to give it hexproof and trample
The main set has 204 numbered cards and 18 Enchanted 3 for each ink, like the last few sets
that would appear in the Tin of Lost Memories
Opened, put into soft sleeves, then inserted into Ultra Pro top loaders
However, do you have enough copies of vital cards in your deck that milling ten wont accidentally cut you off from all of them