Each ink is named after a precious element, such as Amber, Amethyst, Emerald, Ruby, Sapphire, and Steel, and any combination of two of these is a viable deck for the standard game
Like most Magic: The Gathering cards, the value of Tamiyo's Safekeeping depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secret Lair Drop)
The Lorcana Collectors Guides act as a way for new players to catch up on all the lore from each of the first eight sets, broken down into two blocks of four
In contrast, Souvenir Snatcher can snatch artifacts from your opponents, and and Cavern Whisperer can force them to discard
Toolbox decks like to keep their options open, controlling the board until the time comes for them to win