Ardent Elementalist

When Ardent Elementalist enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Guardian Gladewalker

Changeling (This card is every creature type.)
When Guardian Gladewalker enters the battlefield, put a +1/+1 counter on target creature.

Biblioplex Assistant

Flying
When Biblioplex Assistant enters the battlefield, put up to one target instant or sorcery card from your graveyard on top of your library.

Imperial Recruiter

When Imperial Recruiter enters the battlefield, search your library for a creature card with power 2 or less, reveal it, put it into your hand, then shuffle.

Mwonvuli Beast Tracker

When Mwonvuli Beast Tracker enters the battlefield, search your library for a creature card with deathtouch, hexproof, reach, or trample and reveal it. Shuffle and put that card on top.

Fierce Empath

When Fierce Empath enters the battlefield, you may search your library for a creature card with mana value 6 or greater, reveal it, put it into your hand, then shuffle.

Mogg War Marshal

Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Mogg War Marshal enters the battlefield or dies, create a 1/1 red Goblin creature token.

Champion of Lambholt

Creatures with power less than Champion of Lambholt's power can't block creatures you control.
Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Champion of Lambholt.

Iron Bully

Menace (This creature can't be blocked except by two or more creatures.)
When Iron Bully enters the battlefield, put a +1/+1 counter on target creature.

Farhaven Elf

When Farhaven Elf enters the battlefield, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Blisterstick Shaman

When Blisterstick Shaman enters the battlefield, it deals 1 damage to any target.

Bond Beetle

When Bond Beetle enters the battlefield, put a +1/+1 counter on target creature.

Borderland Explorer

When Borderland Explorer enters the battlefield, each player may discard a card. Each player who discarded a card this way may search their library for a basic land card, reveal it, put it into their hand, then shuffle.

Elvish Rejuvenator

When Elvish Rejuvenator enters the battlefield, look at the top five cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest on the bottom of your library in a random order.

Elvish Vanguard

Whenever another Elf enters the battlefield, put a +1/+1 counter on Elvish Vanguard.

Prosperous Innkeeper

When Prosperous Innkeeper enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
Whenever another creature enters the battlefield under your control, you gain 1 life.

Epochrasite

Epochrasite enters the battlefield with three +1/+1 counters on it if you didn't cast it from your hand.
When Epochrasite dies, exile it with three time counters on it and it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may cast this card without paying its mana cost. It has haste.)

Elvish Pioneer

When Elvish Pioneer enters the battlefield, you may put a basic land card from your hand onto the battlefield tapped.

Dauntless Survivor

When Dauntless Survivor enters the battlefield, put a +1/+1 counter on target creature.

Hans Eriksson

Whenever Hans Eriksson attacks, reveal the top card of your library. If it's a creature card, put it onto the battlefield tapped and attacking defending player or a planeswalker they control. Otherwise, put that card into your hand. When you put a creature card onto the battlefield this way, it fights Hans Eriksson.

Fervent Cathar

Haste
When Fervent Cathar enters the battlefield, target creature can't block this turn.

Akki Rockspeaker

When Akki Rockspeaker enters the battlefield, add {R}.

Ironshell Beetle

When Ironshell Beetle enters the battlefield, put a +1/+1 counter on target creature.

Farfinder

Vigilance
When Farfinder enters the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Ferocious Pup

When Ferocious Pup enters the battlefield, create a 2/2 green Wolf creature token.

Dire Fleet Daredevil

First strike
When Dire Fleet Daredevil enters the battlefield, exile target instant or sorcery card from an opponent's graveyard. You may cast it this turn, and mana of any type can be spent to cast that spell. If that spell would be put into a graveyard, exile it instead.

Eternal Witness

When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand.

Maul Splicer

When Maul Splicer enters the battlefield, create two 3/3 colorless Phyrexian Golem artifact creature tokens.
Golem creatures you control have trample.

Campus Guide

When Campus Guide enters the battlefield, you may search your library for a basic land card, reveal it, then shuffle and put that card on top.

Cherished Hatchling

When Cherished Hatchling dies, you may cast Dinosaur spells this turn as though they had flash, and whenever you cast a Dinosaur spell this turn, it gains "When this creature enters the battlefield, you may have it fight another target creature."

Ainok Guide

When Ainok Guide enters the battlefield, choose one —
• Put a +1/+1 counter on Ainok Guide.
• Search your library for a basic land card, reveal it, then shuffle and put that card on top.

Kessig Malcontents

When Kessig Malcontents enters the battlefield, it deals damage to target player or planeswalker equal to the number of Humans you control.