
Descendant of Storms | Creature | Human Soldier | Whenever this creature attacks, you may pay {1}{W}. If you do, it endures 1. (Put a +1/+1 counter on it or create a 1/1 white Spirit creature token.) | Lie Setiawan

Mardu Devotee | Creature | Human Scout | When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{1}: Add {R}, {W}, or {B}. Activate only once each turn. | Lorenzo Mastroianni

Dragonstorm Forecaster | Creature | Human Scout | {2}, {T}: Search your library for a card named Dragonstorm Globe or Boulderborn Dragon, reveal it, put it into your hand, then shuffle. | Kev Fang

Humbling Elder | Creature | Human Monk | Flash
When this creature enters, target creature an opponent controls gets -2/-0 until end of turn. | Yohann Schepacz

Ringing Strike Mastery | Enchantment | Aura | Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has "{5}: Untap this creature." | Alexandre Honoré

Spectral Denial | Instant | | This spell costs {1} less to cast for each creature you control with power 4 or greater.
Counter target spell unless its controller pays {X}. | Xabi Gaztelua

Unending Whisper | Sorcery | | Draw a card.
Harmonize {5}{U} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.) | Danny Schwartz

Wingspan Stride | Enchantment | Aura | Enchant creature
Enchanted creature gets +1/+1 and has flying.
{2}{U}: Return this Aura to its owner's hand. | Jake Murray

Caustic Exhale | Instant | | As an additional cost to cast this spell, behold a Dragon or pay {1}. (To behold a Dragon, choose a Dragon you control or reveal a Dragon card from your hand.)
Target creature gets -3/-3 until end of turn. | Camille Alquier

Desperate Measures | Instant | | Target creature gets +1/-1 until end of turn. When it dies under your control this turn, draw two cards. | Gaboleps

Worthy Cost | Sorcery | | As an additional cost to cast this spell, sacrifice a creature.
Exile target creature or planeswalker. | Andrew Mar

Channeled Dragonfire | Sorcery | | Channeled Dragonfire deals 2 damage to any target.
Harmonize {5}{R}{R} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.) | Jorge Jacinto

Fleeting Effigy | Creature | Elemental | Haste
At the beginning of your end step, return this creature to its owner's hand. (Return it only if it's on the battlefield.)
{2}{R}: This creature gets +2/+0 until end of turn. | Darren Tan

Stadium Headliner | Creature | Goblin Warrior | Mobilize 1 (Whenever this creature attacks, create a tapped and attacking 1/1 red Warrior creature token. Sacrifice it at the beginning of the next end step.)
{1}{R}, Sacrifice this creature: It deals damage equal to the number of creatures you control to target creature. | Ralph Horsley

Wild Ride | Sorcery | | Target creature gets +3/+0 and gains haste until end of turn.
Harmonize {4}{R} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by {X}, where X is its power. Then exile this spell.) | Filipe Pagliuso

Dragon Sniper | Creature | Human Archer | Vigilance, reach, deathtouch | David Auden Nash

Snakeskin Veil | Instant | | Put a +1/+1 counter on target creature you control. It gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.) | Monztre

Dragonfire Blade | Artifact | Equipment | Equipped creature gets +2/+2 and has hexproof from monocolored.
Equip {4}. This ability costs {1} less to activate for each color of the creature it targets. | Clint Lockwood