Sunscorched Hardiness
Enchantment
Each creature you control enters the battlefield with an additional -1/-1 counter.
, Remove a -1/-1 counter from a creature you control: That creature gets +2/+2 until end of turn.
"Harsh conditions breed strong scales."
—Rhonas, god of strength

Water to Blood
Enchantment — Aura Curse
Enchant player
Whenever enchanted player casts a spell, if mana from a nonbasic land source was spent to cast it, counter that spell unless its controller pays .
The Gate to the Afterlife opened and Razaketh emerged.

Sealed Sarcophagus

Artifact (U)
When Sealed Sarcophagus enters the battlefield, exile target creature card from a graveyard.
When Sealed Sarcophagus is put into a graveyard from the battlefield, put the exiled creature card onto the battlefield under your control.

Barren Dunes
Land - Desert
: Add . If you control a Legendary God, add one mana of any color instead.
Before the God-Pharoah ascended, the Gods blessed even the most desolate wastes with vibrant life. But now that is no more.

Ixalan next.

Bellyful Shipeater
Creature — Dinosaur
Enrage — Whenever Bellyful Shipeater is dealt damage, create a 1/1 white Vampire creature token with lifelink.
Their saving grace was it swallows everything in one gulp.
1/5

Keelhaul
Sorcery
Target creature's controller mills cards equal to that creature's mana value, then put that creature on top of it's owner's library.
"Everyone makes mistakes. This ensures they only make 'em once."
—Captain Brinely Rage

Artificial Sinkhole -
Sorcery
Affinity for Pirates
Destroy target land.
”Don’t know why some people think we’re the good guys.”

Storm the Beach
Sorcery
Choose one —

• Create three 2/2 black Pirate creature tokens with menace. They gain haste until end of turn. Sacrifice them at the beginning of the next end step.
• Create two 3/3 green Dinosaur creature tokens with trample. They gain haste until end of turn. Sacrifice them at the beginning of the next end step.

"Let them go at each other. Their blood is not worth the letting." — Mavren Fein

Eternity Seeker
Creature - Human Warrior
When ~ enters the battlefield, it explores.
, Discard a land card from your hand: ~ explores.
"Every new vista is one less place I need to search."
[1/1]

Underbrush Hunter
Creature — Dinosaur (U)
Menace
Whenever a creature you control explores, you may return Underbrush Hunter from your graveyard to your hand.
"There are ways even the rivers will not wind." — Tishana
3/3

Captain Vance's Tricorn
Legendary Artifact - Equipment
Equipped creature is a Pirate in addition to it's other types, and has hexproof and indestructible as long as you control another Pirate.
Equip
Equip Pirate
"Everyone else sees us thinks we're nothing but thieves and scoundrels. They've never experienced what it's like to be part of a proper crew - one that would fight to the last for you."

High and Dry
Land
High and Dry enters the battlefield tapped.
: Add , , or .
: Until end of turn, High and Dry becomes a 3/3 blue, black, and red Pirate creature with menace and "Whenever this creature deals combat damage to an opponent, draw a card." It's still a land.
As long as High and Dry floats, so do the Brazen Coalition's hopes.

Next is Shandalar. Possible inspiration

Hive Sliver
Creature — Sliver
Slivers you control have "Whenever this Sliver dies, create a 1/1 colorless Sliver creature token."
"They perhaps have mastered Oketra's lessons better than me." — Basri
1/1

Dive Sliver
Creature - Sliver
Slivers you control have Ward . (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
"Truly, no domain is beyond their reach."
—Hastric, Thunian scout
3/3

Vessel of the Chain Veil
Enchantment — Saga
I - You lose half of your life total, rounded up. Draw a card.
II - You lose half of your life total, rounded up. Draw two cards.
III - You lose half of your life total, rounded up. Draw three cards.
IV - Exile Vessel of the Chain Veil. It gains suspend and put three time counters on it.

Kird Shaman
Creature - Ape (R)
Kird Shaman gets +1/+1 as long as you control a Forest.
: Destroy target artifact or enchantment with mana value 1 or less.
[1/1]

(does this count for red or does color identity matter?)

I believe that most games (except the color identity game) only look at the color of the card


Alive Sliver -
Creature - Sliver
As long as ~ is in your graveyard, Sliver creature cards in your graveyard have ": Return this card from your graveyard to your hand."
1/1

Convergence Sliver
Creature — Sliver
Each Sliver card you own not on the battlefield has mutate. Its mutate cost is equal to its mana cost reduced by .
Mutate
All genetic material flows from the same source and no matter how far it may go, it will return to its original pool.
3/3

Sliver Lure
Artifact
: ~ gains all abilities of target Sliver until end of turn.
If one or more Slivers would deal combat damage to you, you may sacrifice Sliver Lure instead.

Ammonite Chasm
Land (U)
Ammonite Chasm enters the battlefield tapped.
When Ammonite Chasm enters the battlefield, target creature with power 2 or less can't be blocked this turn.
: Add .
Within its depths, the amphin wait.

Next is Fiora.