
Ambling Stormshell | Creature | Turtle | Ward {2}
Whenever this creature attacks, put three stun counters on it and draw three cards. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Whenever you cast a Turtle spell, untap this creature. | Carlos Palma Cruchaga

Constrictor Sage | Creature | Snake Wizard | When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Renew — {2}{U}, Exile this card from your graveyard: Tap target creature an opponent controls and put a stun counter on it. Activate only as a sorcery. | Nereida

Focus the Mind | Instant | | This spell costs {2} less to cast if you've cast another spell this turn.
Draw three cards, then discard a card. | Fariba Khamseh

Iceridge Serpent | Creature | Serpent | When this creature enters, return target creature an opponent controls to its owner's hand. | Brian Valeza

Whirlwing Stormbrood | Creature | Dragon | Flash
Flying
You may cast sorcery spells and Dragon spells as though they had flash. | Fajareka Setiawan

Iridescent Tiger | Creature | Cat | When this creature enters, if you cast it, add {W}{U}{B}{R}{G}. | Fajareka Setiawan

Narset's Rebuke | Instant | | Narset's Rebuke deals 5 damage to target creature. Add {U}{R}{W}. If that creature would die this turn, exile it instead. | Diego Gisbert

Jeskai Shrinekeeper | Creature | Dragon | Flying, haste
Whenever this creature deals combat damage to a player, you gain 1 life and draw a card. | Andrew Mar

New Way Forward | Instant | | The next time a source of your choice would deal damage to you this turn, prevent that damage. When damage is prevented this way, New Way Forward deals that much damage to that source's controller and you draw that many cards. | Eli Minaya

Shiko, Paragon of the Way | Legendary Creature | Spirit Dragon | Flying, vigilance
When Shiko enters, exile target nonland card with mana value 3 or less from your graveyard. Copy it, then you may cast the copy without paying its mana cost. (A copy of a permanent spell becomes a token.) | Victor Adame Minguez

Lotuslight Dancers | Creature | Zombie Bard | Lifelink
When this creature enters, search your library for a black card, a green card, and a blue card. Put those cards into your graveyard, then shuffle. | Jodie Muir

Teval, Arbiter of Virtue | Legendary Creature | Spirit Dragon | Flying, lifelink
Spells you cast have delve. (Each card you exile from your graveyard while casting those spells pays for {1}.)
Whenever you cast a spell, you lose life equal to its mana value. | Alexander Ostrowski

Mammoth Bellow | Sorcery | | Create a 5/5 green Elephant creature token.
Harmonize {5}{G}{U}{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.) | Xavier Ribeiro

Roar of Endless Song | Enchantment | Saga | (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Create a 5/5 green Elephant creature token.
III — Double the power and toughness of each creature you control until end of turn. | Clint Lockwood

Call the Spirit Dragons | Enchantment | | Dragons you control have indestructible.
At the beginning of your upkeep, for each color, put a +1/+1 counter on a Dragon you control of that color. If you put +1/+1 counters on five Dragons this way, you win the game. | Liiga Smilshkalne