Ixalan

Axis of Mortality | Enchantment | | At the beginning of your upkeep, you may have two target players exchange life totals. | Bastien L. Deharme

Bellowing Aegisaur | Creature | Dinosaur | Enrage — Whenever Bellowing Aegisaur is dealt damage, put a +1/+1 counter on each other creature you control. | Craig J Spearing

River's Rebuke | Sorcery | | Return all nonland permanents target player controls to their owner's hand. | Raymond Swanland

Deathless Ancient | Creature | Vampire Knight | Flying Tap three untapped Vampires you control: Return Deathless Ancient from your graveyard to your hand. | Nils Hamm

Queen's Agent | Creature | Vampire Scout | Lifelink When Queen's Agent enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) | Winona Nelson

Burning Sun's Avatar | Creature | Dinosaur Avatar | When Burning Sun's Avatar enters the battlefield, it deals 3 damage to target opponent or planeswalker and 3 damage to up to one target creature. | Randy Vargas

Sun-Crowned Hunters | Creature | Dinosaur | Enrage — Whenever Sun-Crowned Hunters is dealt damage, it deals 3 damage to target opponent or planeswalker. | Aaron Miller

Sunbird's Invocation | Enchantment | | Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order. | Christine Choi

Carnage Tyrant | Creature | Dinosaur | This spell can't be countered. Trample, hexproof | Yeong-Hao Han

Colossal Dreadmaw | Creature | Dinosaur | Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) | Jesper Ejsing

Vraska, Relic Seeker | Legendary Planeswalker | Vraska | +2: Create a 2/2 black Pirate creature token with menace. −3: Destroy target artifact, creature, or enchantment. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") −10: Target player's life total becomes 1. | Chris Rahn