Progenitor Mimic

Species Gorger

Creature — Frog Beast (6/6)

At the beginning of your upkeep, return a creature you control to its owner's hand.

Scion of Vitu-Ghazi

Creature — Elemental (4/4)

When Scion of Vitu-Ghazi enters the battlefield, if you cast it from your hand, create a 1/1 white Bird creature token with flying, then populate. (Create a token that's a copy of a creature token you control.)

Trostani's Summoner

Creature — Elf Shaman (1/1)

When Trostani's Summoner enters the battlefield, create a 2/2 white Knight creature token with vigilance, a 3/3 green Centaur creature token, and a 4/4 green Rhino creature token with trample.

Boros Battleshaper

Creature — Minotaur Soldier (5/5)

At the beginning of each combat, up to one target creature attacks or blocks this combat if able and up to one target creature can't attack or block this combat.

Scab-Clan Giant

Creature — Giant Warrior (4/5)

When Scab-Clan Giant enters the battlefield, it fights target creature an opponent controls chosen at random.

Blaze Commando

Creature — Minotaur Soldier (5/3)

Whenever an instant or sorcery spell you control deals damage, create two 1/1 red and white Soldier creature tokens with haste.

Sire of Insanity

Creature — Demon (6/4)

At the beginning of each end step, each player discards their hand.

Aetherling

Creature — Shapeshifter (4/5)

: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step.
: Aetherling can't be blocked this turn.
: Aetherling gets +1/-1 until end of turn.
: Aetherling gets -1/+1 until end of turn.

Emmara Tandris

Legendary Creature — Elf Shaman (5/7)

Prevent all damage that would be dealt to creature tokens you control.

Lavinia of the Tenth

Legendary Creature — Human Soldier (4/4)

Protection from red
When Lavinia of the Tenth enters the battlefield, detain each nonland permanent your opponents control with mana value 4 or less. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Teysa, Envoy of Ghosts

Legendary Creature — Human Advisor (4/4)

Vigilance, protection from creatures
Whenever a creature deals combat damage to you, destroy that creature. Create a 1/1 white and black Spirit creature token with flying.

Haunter of Nightveil

Creature — Spirit (3/4)

Creatures your opponents control get -1/-0.

Jelenn Sphinx

Creature — Sphinx (1/5)

Flying, vigilance
Whenever Jelenn Sphinx attacks, other attacking creatures get +1/+1 until end of turn.

Korozda Gorgon

Creature — Gorgon (2/5)

Deathtouch
, Remove a +1/+1 counter from a creature you control: Target creature gets -1/-1 until end of turn.

Melek, Izzet Paragon

Legendary Creature — Weird Wizard (2/4)

Play with the top card of your library revealed.
You may cast instant and sorcery spells from the top of your library.
Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy.

Ruric Thar, the Unbowed

Legendary Creature — Ogre Warrior (6/6)

Vigilance, reach
Ruric Thar, the Unbowed attacks each combat if able.
Whenever a player casts a noncreature spell, Ruric Thar deals 6 damage to that player.

Zhur-Taa Ancient

Creature — Beast (7/5)

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Blood Baron of Vizkopa

Creature — Vampire (4/4)

Lifelink, protection from white and from black
As long as you have 30 or more life and an opponent has 10 or less life, Blood Baron of Vizkopa gets +6/+6 and has flying.

Armored Wolf-Rider

Creature — Elf Knight (4/6)

Mirko Vosk, Mind Drinker

Legendary Creature — Vampire (2/4)

Flying
Whenever Mirko Vosk, Mind Drinker deals combat damage to a player, that player reveals cards from the top of their library until they reveal four land cards, then puts those cards into their graveyard.