Necropotence is a card so good it's banned or restricted in all non-Commander formats, so it being at four copies in Timeless is a big deal
So decks built around Chains could still generate tons of card advantage, while everyone else looking to draw cards will be unable to do so
[13] Remember the phases of the turn: Untap : Untap all of the lands, creatures, and permanents on your board
The next most universal option is Rogues Gloves, with its analogue in Dimir, Mask of Riddles, which grants fear as a bonus
Each card in the deck must differ from each other card in the deck in at least one of the following: Name, Pokmon Type, HP, Retreat Cost, Weakness, Resistance, Ancient Trait, Ability, Pokmon Power, Pok-Power, Pok-Body, or Attack (where attack cost and base attack damage are considered a part of the attack), with the following exceptions: You may include any number of basic energy cards with the same name