Kelogsloops

The bond between spellcaster and familiar allows the mage to detect even the smallest of magical ripples—and use them to their advantage.

Mystic Remora

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.

Sunpearl Kirin

Flash
Flying
When this creature enters, return up to one other target nonland permanent you control to its owner's hand. If it was a token, draw a card.

Mental Misstep

({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.

Island

Forget bait, forget hooks, forget line, forget troubles, and enjoy being on the water while the fish swim around.

Dandân

This creature can't attack unless defending player controls an Island.
When you control no Islands, sacrifice this creature.

Remember friends, remember family, remember good times, and reawaken when it's time to reel in dinner.

Don't be sad the song has ended. Be happy you heard its final notes.

Swan Song

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

"I can prove I won fair and square—I have the receipt."

Revel in Riches

Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
At the beginning of your upkeep, if you control ten or more Treasures, you win the game.

Ugin, the Spirit Dragon

[+2]: Ugin deals 3 damage to any target.
[−X]: Exile each permanent with mana value X or less that's one or more colors.
[−10]: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.

Utopia Sprawl

Enchant Forest
As this Aura enters, choose a color.
Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.

Their Enclave overrun, the merfolk took refuge within beauty.

Retreat to Coralhelm

Landfall — Whenever a land you control enters, choose one —
• You may tap or untap target creature.
• Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Given time, a single seed can sprout a mighty forest.

Burgeoning

Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield.