Lim-Dûl's Paladin

Creature — Human Knight (0/3)

Trample
At the beginning of your upkeep, you may discard a card. If you don't, sacrifice Lim-Dûl's Paladin and draw a card.
Whenever Lim-Dûl's Paladin becomes blocked, it gets +6/+3 until end of turn.
Whenever Lim-Dûl's Paladin attacks and isn't blocked, it assigns no combat damage this turn and defending player loses 4 life.

Marhault Elsdragon

Legendary Creature — Elf Warrior (4/6)

Rampage 1 (Whenever this creature becomes blocked, it gets +1/+1 until end of turn for each creature blocking it beyond the first.)

Marneus Calgar

Legendary Creature — Astartes Warrior (3/5)

Double strike
Master Tactician — Whenever one or more tokens enter the battlefield under your control, draw a card.
Chapter Master — : Create two 2/2 white Astartes Warrior creature tokens with vigilance.

Master of Cruelties

Creature — Demon (1/4)

First strike, deathtouch
Master of Cruelties can only attack alone.
Whenever Master of Cruelties attacks a player and isn't blocked, that player's life total becomes 1. Master of Cruelties assigns no combat damage this combat.

Nyxborn Brute

Enchantment Creature — Cyclops (7/3)

Nyxborn Colossus

Enchantment Creature — Giant (6/7)

Nyxborn Marauder

Enchantment Creature — Minotaur (4/3)

Nyxborn Seaguard

Enchantment Creature — Merfolk Soldier (2/5)

Obuun, Mul Daya Ancestor

Legendary Creature — Elf Spirit (3/3)

At the beginning of combat on your turn, up to one target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is Obuun's power. It's still a land.
Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on target creature.

Phelddagrif

Legendary Creature — Phelddagrif (4/4)

: Phelddagrif gains trample until end of turn. Target opponent creates a 1/1 green Hippo creature token.
: Phelddagrif gains flying until end of turn. Target opponent gains 2 life.
: Return Phelddagrif to its owner's hand. Target opponent may draw a card.

Primal Visitation

Enchantment — Aura

Enchant creature
Enchanted creature gets +3/+3 and has haste.

Questing Phelddagrif

Creature — Phelddagrif (4/4)

: Questing Phelddagrif gets +1/+1 until end of turn. Target opponent creates a 1/1 green Hippo creature token.
: Questing Phelddagrif gains protection from black and from red until end of turn. Target opponent gains 2 life.
: Questing Phelddagrif gains flying until end of turn. Target opponent may draw a card.

Rafiq of the Many

Legendary Creature — Human Knight (3/3)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Whenever a creature you control attacks alone, it gains double strike until end of turn.

Rakdos Ringleader

Creature — Skeleton Warrior (3/1)

First strike
Whenever Rakdos Ringleader deals combat damage to a player, that player discards a card at random.
: Regenerate Rakdos Ringleader.

Rakdos, Lord of Riots

Legendary Creature — Demon (6/6)

You can't cast this spell unless an opponent lost life this turn.
Flying, trample
Creature spells you cast cost less to cast for each 1 life your opponents have lost this turn.

Rakdos, the Muscle

Legendary Creature — Demon Mercenary (6/5)

Flying, trample
Whenever you sacrifice another creature, exile cards equal to its mana value from the top of target player's library. Until your next end step, you may play those cards, and mana of any type can be spent to cast those spells.
Sacrifice another creature: Rakdos, the Muscle gains indestructible until end of turn. Tap it. Activate only once each turn.

Rakdos, the Showstopper

Legendary Creature — Demon (6/6)

Flying, trample
When Rakdos, the Showstopper enters the battlefield, flip a coin for each creature that isn't a Demon, Devil, or Imp. Destroy each creature whose coin comes up tails.

Ramirez DePietro

Legendary Creature — Human Pirate (4/3)

First strike

Regisaur Alpha

Creature — Dinosaur (4/4)

Other Dinosaurs you control have haste.
When Regisaur Alpha enters the battlefield, create a 3/3 green Dinosaur creature token with trample.

Roalesk, Apex Hybrid

Legendary Creature — Human Mutant (4/5)

Flying, trample
When Roalesk, Apex Hybrid enters the battlefield, put two +1/+1 counters on another target creature you control.
When Roalesk dies, proliferate, then proliferate again. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)