https://magic.wizards.com/en/game-info/products/card-set-archive/kaladesh

Rules

The following rules changes from KLD may be relevant for XMage:

[x] New symbol for energy counters, represented in plain text as {E}, and counter costs as a new type of cost (“Pay {E}” means “remove an energy counter from yourself”).
[ ] Face-up objects in the command zone can now be chosen as a source of damage. Notably, the emblem of Chandra, Torch of Defiance can be chosen.
[x] New artifact type: Vehicle
[x] New planeswalker type: Dovin
[x] New planeswalker type: Saheeli
[x] New creature type: Aetherborn
[x] New creature type: Monkey
[x] New creature type: Pilot
[x] New creature type: Servo
[ ] New rules concerning power and toughness on noncreature objects:

208.3a. If an effect would be created that affects the power and/or toughness of a noncreature permanent, that effect is created even though it doesn't do anything unless that permanent becomes a creature.

Example: Veteran Motorist has the ability "Whenever Veteran Motorist crews a Vehicle, that Vehicle gets +1/+1 until end of turn," and it's tapped to pay the crew cost of a Vehicle. This triggered ability resolves while the Vehicle it crewed isn't yet a creature. The continuous effect is created and will apply to the Vehicle once it becomes a creature.

208.5. If a creature somehow has no value for its power, its power is 0. The same is true for toughness.

301.7a. Each Vehicle has a printed power and toughness, but it has these characteristics only if it's also a creature. See rule 208.3.

301.7b. If a Vehicle becomes a creature, it immediately has its printed power and toughness. Other effects, including the effect that makes it a creature, may modify these values or set them to different values.
[ ] New rule regarding one-shot effects with durations:

610.3c. If multiple one-shot effects are created this way immediately after one or more simultaneous events, those one-shot effects are also simultaneous.

Example: Two Banisher Priests have each exiled a card. All creatures are destroyed at the same time by Day of Judgment. The two exiled cards are returned to the battlefield at the same time.
[x] New keyword action: create
[ ] New rule regarding revealed cards in libraries:

701.14c. If cards in a player's library are shuffled or otherwise reordered, any revealed cards that are reordered stop being revealed and become new objects.
[ ] Populate, investigate, living weapon, and myriad have been redefined using create. Reminder text may need to be updated.
[x] New keyword ability: crew
[x] New keyword ability: fabricate
Oracle

In KLD, there have been the following Oracle changes which will have to be implemented. Functional errata are marked in boldface, and unimplemented cards are omitted.

Multiple cards

[x] Card names with Æ or æ in them have been changed to use Ae or ae.
[x] Aluren, Quick Sliver, and Winding Canyons now say “cast creature spells” instead of “play creature cards”. Notably, you can no longer play Dryad Arbor at instant speed using Aluren or Winding Canyons.
[ ] A comma has been added to some cards that create copy effects with exceptions.
[ ] Cards that put tokens onto the battlefield now use the create keyword action. Note how status modifiers like “tapped” sometimes precede the other characteristics like P/T.
Single card
[ ] Avarice Amulet: changed to use “whenever” instead of “when”.
[x] Fluctuator: extra “you” removed.
[ ] Lion's Eye Diamond: Activation costs listed in a different order for consistency. Not a functional change since costs can always be paid in any order.
Cards

The following cards have been printed in KLD and will have to be implemented.

magefree / mage

KLD - Kaladesh set cards, rules and Oracle update #2473

Rules

Oracle

Multiple cards

Single card

Cards

Reprints

New cards