Form of the Aetherborn —
Enchantment (R)
When Form of the Aetherborn enters the battlefield, your life total becomes 0.
You don't lose the game for having 0 or less life.
If you would gain life, add that much instead.
If you would lose life, pay that much instead. If you can't, you lose the game.

Articifer's Workbench

Artifact (R)
If an effect would create one or more artifact tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on an artifact you control, it puts twice that many of those counters on that permanent instead.

Amonkhet

Basri, Champion of Oketra
Legendary Planeswalker — Basri
Whenever a creature you control attacks, you may exert it. If you do, put a loyalty counter on Basri.
: Create two 1/1 white Warrior creature tokens.
: Put a +1/+1 counter on each creature you control. They gain indestructible and lifelink until end of turn.

Kefnet's Puzzles —
Sorcery (U)
Draw two cards, then discard a card unless you spent mana from a Desert to cast Kefnet's Puzzles.

Bontu's Great Betrayal
Legendary Sorcery
You gain control of target creature an opponent controls. Destroy all other creatures.
A century ago, a god's ambition taught her submission.

Hazoret's Flowering Corpse —
Enchantment (R)
Lands have ", Exert this land: Add two mana of any one colour this land could produce."

Survive the Wastes
Instant
Whenever a Desert becomes tapped this turn, put a +1/+1 counter on a creature you control.

Cruel Irony
Instant
You gain control of target spell. You may change any of its targets.
Each of the prophecies of the Accounting of Hours proved true, but in a way no one ever expected.

God-Pharaoh's Sarcophagus —
Artifact (R)
Creature cards in your graveyard with power 4 or greater have eternalize. The eternalize cost is equal to their mana costs. (A card with eternalize has "Pay this card's eternalize cost: Exile this card from your graveyard: Create a token that’s a copy of this card, except it’s black, it’s 4/4, it has no mana cost, and it’s a Zombie in addition to its other types. Eternalize only as a sorcery.”)

XLN

Queen of Hearts —
Creature — Vampire Noble (U)
Whenever another creature you control dies, put a +1/+1 counter on Queen of Hearts.
, Remove a +1/+1 counter from Queen of Hearts: Queen of Hearts gains first strike and menace until end of turn.
“What can I say? They help me keep my waistline.”
1/1

Hungry Mosasaur
Creature — Dinosaur
When Hungry Mosasaur enters the battlefield, exile target Merfolk or Pirate until Hungry Mosasaur leaves the battlefield.
Hungry Mosasaur gets +2/+2 as long as a creature is exiled with it.
3/3

Caged Raptors
Creature — Dinosaur
When Caged Raptors enters the battlefield, create a 2/2 black Pirate creature token with menace.
Caged Raptors can't attack or block as long as you control a Pirate.
"Careful. They're more clever than they seem."
5/2

Notana's Disciple

Creature -- Merfolk Shaman (R)
When Notana's Disciple enters the battlefield, put a +1/+1 counter on another target Merfolk you control.
Whenever another creature you control dies, you may move its +1/+1 counters onto Notana's Disciple.
2/2

Pathfinding Duo —
Creature — Merfolk Scout Human Pirate (U)
When Pathfinding Duo enters the battlefield, it explores.
Whenever a creature exploring reveals a land card, create a Treasure token.
2/2

Treasure Chest
Artifact — Treasure
, Sacrifice Treasure Chest: Reveal the top three cards on your library. Create a Treasure token for each land card from among them. Then, put those cards on top of and/or on the bottom of your library in any order.
, Sacrifice Treasure Chest: Add one mana of any color.

Shadalar

Bani Bakur, Champion of Ardestan
Legendary Creature — Human Soldier
Vigilance
Whenever Bani Bakur deals combat damage to an opponent, destroy target tapped creature that player controls.
Her sword beheaded Lim-Dûl but death was trivial to the necromancer.
2/2