Kiora's Dambreaker

When this creature enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Merfolk of the Depths

Flash (You may cast this spell any time you could cast an instant.)

Sharktocrab

{2}{G}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on this creature, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Loaming Shaman

When this creature enters, target player shuffles any number of target cards from their graveyard into their library.

Island

Keymaster Rogue

This creature can't be blocked.
When this creature enters, return a creature you control to its owner's hand.

Radical Idea

Draw a card.
Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

Fists of Ironwood

Enchant creature
When this Aura enters, create two 1/1 green Saproling creature tokens.
Enchanted creature has trample.

Wild Cantor

({R/G} can be paid with either {R} or {G}.)
Sacrifice this creature: Add one mana of any color.

Rampaging Rendhorn

Riot (This creature enters with your choice of a +1/+1 counter or haste.)

Junktroller

Defender
{T}: Put target card from a graveyard on the bottom of its owner's library.

Forced Landing

Put target creature with flying on the bottom of its owner's library.

Downsize

Target creature you don't control gets -4/-0 until end of turn.
Overload {2}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Sprouting Renewal

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Choose one —
• Create a 2/2 green and white Elf Knight creature token with vigilance.
• Destroy target artifact or enchantment.

Vedalken Mesmerist

Whenever this creature attacks, target creature an opponent controls gets -2/-0 until end of turn.

Simic Guildgate

This land enters tapped.
{T}: Add {G} or {U}.

Leapfrog

This creature has flying as long as you've cast an instant or sorcery spell this turn.

Rhythm of the Wild

Creature spells you control can't be countered.
Nontoken creatures you control have riot. (They enter with your choice of a +1/+1 counter or haste.)

Forced Adaptation

Enchant creature
At the beginning of your upkeep, put a +1/+1 counter on enchanted creature.

Frilled Mystic

Flash
When this creature enters, you may counter target spell.

Forest

Arboreal Grazer

Reach
When this creature enters, you may put a land card from your hand onto the battlefield tapped.

Overwhelm

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Creatures you control get +3/+3 until end of turn.

Prime Speaker Zegana

Prime Speaker Zegana enters with X +1/+1 counters on it, where X is the greatest power among other creatures you control.
When Prime Speaker Zegana enters, draw cards equal to its power.

Copy Enchantment

You may have this enchantment enter as a copy of any enchantment on the battlefield.

Coiling Oracle

When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

Blood Crypt

({T}: Add {B} or {R}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Kasmina's Transmutation

Enchant creature
Enchanted creature loses all abilities and has base power and toughness 1/1.

Compulsive Research

Target player draws three cards. Then that player discards two cards unless they discard a land card.

Horncaller's Chant

Create a 4/4 green Rhino creature token with trample, then populate. (Create a token that's a copy of a creature token you control.)

Murmuring Mystic

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.