Rivals of Ixalan

Paladin of Atonement | Creature | Vampire Knight | At the beginning of each upkeep, if you lost life last turn, put a +1/+1 counter on Paladin of Atonement. When Paladin of Atonement dies, you gain life equal to its toughness. | Lius Lasahido

Sphinx's Decree | Sorcery | | Each opponent can't cast instant or sorcery spells during that player's next turn. | Daarken

Warkite Marauder | Creature | Human Pirate | Flying Whenever Warkite Marauder attacks, target creature defending player controls loses all abilities and has base power and toughness 0/1 until end of turn. | Victor Adame Minguez

Dead Man's Chest | Enchantment | Aura | Enchant creature an opponent controls When enchanted creature dies, exile cards equal to its power from the top of its owner's library. You may cast spells from among those cards for as long as they remain exiled, and you may spend mana as though it were mana of any type to cast those spells. | Jason A. Engle

Dire Fleet Poisoner | Creature | Human Pirate | Flash Deathtouch When Dire Fleet Poisoner enters the battlefield, target attacking Pirate you control gets +1/+1 and gains deathtouch until end of turn. | Ben Maier

Dire Fleet Daredevil | Creature | Human Pirate | 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 you may spend mana as though it were mana of any type to cast that spell. If that spell would be put into a graveyard this turn, exile it instead. | Zoltan Boros

Tilonalli's Summoner | Creature | Human Shaman | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Whenever Tilonalli's Summoner attacks, you may pay {X}{R}. If you do, create X 1/1 red Elemental creature tokens that are tapped and attacking. At the beginning of the next end step, exile those tokens unless you have the city's blessing. | Lius Lasahido

Deeproot Elite | Creature | Merfolk Warrior | Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on target Merfolk you control. | Winona Nelson

Path of Mettle | Legendary Enchantment | | When Path of Mettle enters the battlefield, it deals 1 damage to each creature that doesn't have first strike, double strike, vigilance, or haste. Whenever you attack with at least two creatures that have first strike, double strike, vigilance, and/or haste, transform Path of Mettle. | Victor Adame Minguez

Siegehorn Ceratops | Creature | Dinosaur | Enrage — Whenever Siegehorn Ceratops is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.) | Filip Burburan