Many, many new cards. I'm going to skip all the packfillers.
Loki Neutral 8 mana 5/5 (7/7)
Fanfare: Give this effect to the leader, When the follower activates fanfare (except the ability to select an object), activates fanfare one more time (this effect does not stack)
Flash Step 5 mana sword bronze spell:
Put a Sworcraft follower from your hand into play. It gains Rush. Return it to hand at the end of this turn.
Fang Serpent Blood 3 mana 3/2 (5/4) Last Words: Your leader heals 2 defense.
Rune 3 mana 1/4 (1/4). Europa Enhance 5 : Evolve this follower Evolved : Ward, Bane, Storm.
Celestial River 3 mana neutral bronze amulet
Countdown 1 At the end of your turn, draw a card.
Fanfare: Draw a card. Enhance 5: change this card's countdown to 3 instead.
Gigant Chimera 9 mana rune legend 6/6
Fanfare: Deal 3 damage spread among all enemy followers, starting from left to right. If there are no enemy followers left, excess damage is dealt to the enemy leader. Spellboost: +1 damage.
Cursed Knowledge 3 mana silver spell
Destroy 1 allied follower, then destroy 1 enemy follower (of your choice).
Stheno 7 mana blood gold 3/6 Fanfare: Summon 2 Venomous Snakes.
Whenever an allied Venomous Snake enters play, deal 2 damage to a random enemy follower.
Great Taurus 8 mana haven gold 5/3 Storm
When this attacks an enemy follower, deal damage to that follower equal to this card's current attack, before dealing combat damage.
Hunter with a Magical gun
Silver 3 Mana Rune Stats: 2/2 (4/4) Fanfare: If no allied follower is in play, gain Rush and Last Words: Add a Hunter with a Magical gun into your hand.
Wild Golem:
Gold 5 mana Rune 2/4 (3/4) At the end of your turn, deal 1 damage to a random follower X times (maximum 10 times). X equals this follower's attack. Earth Rite: Gain +1/+2.
There are probably a few more cards that are worth talking about, this should be enough for now.
That new Sword spell should really help slower sword decks. it makes many old sword cards significantly better.
It also seems like they are pushing a control rune deck, which sounds great to me.
Suck that Aegis make Chimera useless ,same for BnB to a less extend.
I like the new blood support as well. I guess they want us to play midrange blood.
Edit:
Damnit, even more reveals:
Barbarossa. 5mana 5/4. Swordcraft. Commander. Legendary
Rush, Last Words : At the start of your next turn add a Barbarossa to your hand, if the size of the opponents board is 2 or less make it cost 8, if it is 3 more, make it cost 2.