If you have an Ophidian Eye in your deck, you can happily remove Tome of Legends
To qualify for this list, a card has to appear in at least 3% of eligible decks listed on EDHREC to indicate that its actually heavily played to some degree
For three mana at instant speed, you search your library for a creature card and put it directly into your hand or your graveyard, your choice
Thats why Selesnya players also pack Leylines of Sanctity in their sideboards, and sometimes in the maindeck
Note that Tinybones also draws you cards on each turn, and when they discard to each other as well
You can know use this knowledge to find the probability of drawing a given card in almost any scenario, given that you know how many cards are in your deck, how many copies of the desired card or group of cards are, and how many cards you will be drawing/how many turns you will be taking