First up, here are some things you can expect in Commander Legends:

• A card that lists fourteen creature abilities
Akroma, Vision of Ixidor

• A card that returns three different cards types from the graveyard to the battlefield (and not a combination we’ve ever done before)
Triumphant Reckoning

• A card that basically turns one evergreen keyword action into another evergreen keyword action
Eligeth, Crossroads Augur

• A card that temporarily steals a creature from a new place
Zara, Renegade Recruiter

• A card that’s stronger the fewer colors in your commander’s color identity
War Room and Commander's Plate

• Multiple legendary creatures of siblings of previous legendary creatures
Hans Eriksson (Saffi Eriksdotter), Kamahl, Heart of Krosa (Jeska, Warrior Adept)

• A card that grants certain kinds of protection based on what permanents you have on the battlefield
Rebbec, Architect of Ascension

• A card that references both beginning phase and postcombat main phase
Sphinx of the Second Sun

• A legendary creature that shares four of the five words in its name with three other legendary creatures
Kodama of the East Tree

• A creature with four words of rules text and fifty-two words of reminder text
Apex Devastator

Next, here is some rules text can you expect to see on cards in Commander Legends:

• “damage doesn’t cause you to lose life”
Archon of Coronation

• “any number of Auras and Equipment you control”
Ardenn, Intrepid Archaeologist

• “except for commanders”
Slash the Ranks

• “where X is the number of attacking creatures with flying”
Siani, Eye of the Storm

• “Whenever a token you control leaves the battlefield”
Nadier, Agent of Duskenel

• “Whenever one or more Pirates you control deal damage to your opponents”
Breeches, Brazen Plunderer and Malcolm, Keen-Eyed Navigator

• “Commanders you control have”
Falthis, Shadowcat Familiar

• “X is the number of artifacts you control plus the number of artifact cards in your graveyard”
Armix, Filigree Thrasher

• “chosen at random from among your opponents”
Explosion of Riches

• “You and permanents you control have protection from Salamanders”
Gor Muldrak, Amphinologist

Finally, here are some creature type lines that will appear for the first time in Commander Legends:

• Legendary Creature - Horse
Keleth, Sunmane Familiar

• Legendary Creature – Elemental Lizard
Kediss, Emberclaw Familiar

• Legendary Creature – Spirit Pirate
Ghost of Ramirex DePietro

• Legendary Creature – Elephant Warrior
Hamza, Guardian of Arashin

• Legendary Creature – Chimera
Gnostro, Voice of the Crags

• Legendary Creature – Naga Druid
Imoti, Celebrant of Bounty

• Legendary Creature – Turtle Shaman
Archelos, Lagoon Mystic

• Legendary Creature – Imp
Blim, Comedic Genius

• Legendary Creature – Faerie Knight
Nymris, Oona's Trickster

• Legendary Creature – Rabbit Wizard
Kwain, Itinerant Meddler

1. There is a legendary creature that is simply named "ghost of previous (legendary creature)".
Ghost of Ramirex DePietro

2. There is a card with art that has only appeared in Magic: Online.
Cuombajj Witches

3. There is a permanent with an ability that says,"You control your opponents while..."
Opposition Agent

4. There are four non-evergreen mechanics in this set: one of them is new, and three of them are returning. One of those mechanics has only been featured in one plane
encore, cascade, monarch, partner

5. There's a cycle of five legendary creatures with Partner that are all animal familiars.
Keleth, Sunmane Familiar, Esior, Wardwing Familiar, Falthis, Shadowcat Familiar, Kediss, Emberclaw Familiar, Anara, Wolvid Familiar

6. There is a creature that has a type that Wizards of the Coast designers haven't made a new one of in over 20 years.
Rograkh, Son of Rahgahh

1) There is an 11th member of a popular 10-card cycle.

2) There are two main creature types that get a lot of travel support. The first is a classic creature type, and the other one just came to its own in the last few years.
Elves and Pirates

3) There are multiple legends that have only ever had one attribution in flavor text.
Breeches, Brazen Plunderer (Gamble), Hans Eriksson (Revenant), Jeska, Thrice Reborn (Browbeat), Malcolm, Keen-Eyed Navigator (Scapeshift)

4) There is a Sorcery that begins "Each player secretly chooses a number 0 or greater, and then all those players, reveal those numbers simultaneously
Wheel of Misfortune

5) There's a Commander that basically brings back an old Magic rule.
Yurlok of Scorch Thrash

6) There is a reprint of an uncommon card in the set with this brand new artwork by Chris Cold.
Revenant