Aetherlock Manacles
Artifact — Equipment
When Aetherlock Manacles enters the battlefield, you get .
Whenever equipped creature blocks or is blocked by a creature, you may attach Aetherlock Manacles to that creature.
: Equipped creature can't attack or block this turn. Its activated abilities can't be activated this turn.
Equip

Dwarven Garage
Land
When ~ enters the battlefield, create a 2/1 white Dwarf Pilot creature token with “This creature can’t attack or block.”
: Add .


Next is Amonkhet

Across the Desert
Enchantment (R)
Opponents must exert their creatures as they attack you. (An exerted creature won't untap during it's controller's next untap step.)
Even after surviving their Trials, the few survivors of Naktamun found the desert almost harsher than they could endure.

Eternal Tomentor
Creature - Zombie Warrior (C)
Whenever Eternal Tomentor attacks, defending player loses 3 life unless they sacrifice a nonland permanent or discard a card.
"When the Planar Bridge was destroyed, the heroes cheered, for they had succeeded. They did not stop to think where the army was coming from, and how they are still here."
-Samut
3/4

Dustblast —
Instant (U)
Dustblast deals 1 damage to each creature, then it deals an additional 1 damage to each creature if you control a Desert.

Oath of Samut
Legendary Enchantment
Flash
When Oath of Samut enters the battlefield, target creature you control gets +2/+2 and gains haste and first strike until end of turn.
Whenever a planeswalker enters the battlefield under your control, you may activate one of its loyalty abilities an additional time this turn.
"To ensure the Pretender does not rise again, I will keep watch."

Brick Sphinx -
Artifact
, : Put a brick counter on ~.
: Until end of turn, ~ becomes a 9/9 Sphinx artifact creature with flying. Activate only if there are three or more brick counters on ~.

Tantalizing Mirage
Land - Desert (R)
: Add one mana of any color. An opponent of your choice gains control of Tantalizing Mirage until your next turn.
Just when you think you've reached it, it's back on the horizon instead.

Avast, it be Ixalan's turn.

Servant of Betters
Creature — Human Soldier
When Servant of Betters enters the battlefield, choose Sun Empire or Dusk Legion—

• Sun Empire — Whenever Servant of Betters attacks, target Dinosaur you control gains lifelink until end of turn.
• Dusk Legion — , Sacrifice Servant of Betters: Put a +1/+1 counter on each Vampire you control.

"I have freed you from your cruel masters. We will find you a new place in our society." —Caparocti Sunborn
1/1

Gilled Scrollfinder —
Creature — Merfolk Scout (U)
When Gilled Scrollfinder enters the battlefield, it explores.
If you reveal an instant card while exploring, you may put it into your hand rather than on top of your library.
1/3

That’s a bit OP, remember explore can give a +1/+1 counter


Shock and Awe -
Sorcery
Ascend
Target player discards two cards. If you have the city's blessing, that player discards three cards instead.

Protective Herald
Creature — Merfolk Druid
: Add . If this mana is spent on a creature spell, that creature spell gains hexproof until your next turn.
"We do not know what the river brings, only that it is what we need."
1/1

Elenda's Zealot

Creature -- Vampire Soldier (U)
Lifelink
At the beginning of your end step, put a +1/+1 counter on Elenda's Zealot if you have more life than each opponent.
2/2

Jade Tablet
Artifact — Treasure
When Jade Tablet enters the battlefield, target creature you control explores.
, Sacrifice Jade Tablet: Put a +1/+1 counter on target creature.
, Sacrifice Jade Tablet: Add one mana of any color.

Shandalar

Zaala, Charging into Fire
Legendary Creature — Human Knight
Zaala and other creatures you control have renown 1.
Whenever any number of renowned creatures you control attack an opponent, exile up to one target creature that opponent controls with power equal to or less than that number of renowned creatures.
1/1

Falling with Style -
Enchantment
At the beginning of combat on your turn, target creature you control gains flying until end of turn.