There are lots of situations where you draw it and don't want to use it at first, perhaps you have lots of lands or only very low costing cards, the Chrome Mox will sit in your hand but instead of being dead it will be a get out of jail free card
It also means that cards exiled at instant speed are dead unless those cards are instants themselves
Enlightened Tutor became the backbone for many combo-based decks because it could fetch most pieces of combo-based engines, including at various times Aluren, Enduring Renewal, Opalescence, Cadaverous Bloom, Pattern of Rebirth, Icy Manipulator, and Winter Orb
You can find borderless planeswalker cards in Draft, Set, and Collector Boosters as well as within products that contain those boosters
This can net you anywhere from one to three cards in a turn, giving you the opportunity to dump your hand and then immediately refill it all in the same turn
This has made those two-drop Gramma Talas from set one even more powerful as they now act as a Shift target to reduce the big Gramma Tala, Spirit of the Oceans cost but also they can activate its abilities and will also force your opponents to help you ramp by removing them from the board early game to stop you from shifting and allowing you to eek out more ink advantage
