Foundations

Mold Adder | Creature | Fungus Snake | Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on Mold Adder. | Matt Cavotta

Ambush Wolf | Creature | Wolf | Flash (You may cast this spell any time you could cast an instant.) When this creature enters, exile up to one target card from a graveyard. | Paolo Parente

Apothecary Stomper | Creature | Elephant | Vigilance (Attacking doesn't cause this creature to tap.) When this creature enters, choose one — • Put two +1/+1 counters on target creature you control. • You gain 4 life. | Edgar Sánchez Hidalgo

Beast-Kin Ranger | Creature | Elf Ranger | Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Whenever another creature you control enters, this creature gets +1/+0 until end of turn. | Alexander Mokhov

Cackling Prowler | Creature | Hyena Rogue | Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) Morbid — At the beginning of your end step, if a creature died this turn, put a +1/+1 counter on this creature. | Christopher Burdett

Eager Trufflesnout | Creature | Boar | Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Whenever this creature deals combat damage to a player, create a Food token. (It's an artifact with "{2}, {T} Sacrifice this token: You gain 3 life.") | Filipe Pagliuso

Elfsworn Giant | Creature | Giant | Reach (This creature can block creatures with flying.) Landfall — Whenever a land you control enters, create a 1/1 green Elf Warrior creature token. | Dave Dorman

Elvish Regrower | Creature | Elf Druid | When this creature enters, return target permanent card from your graveyard to your hand. | Zoltan Boros

Loot, Exuberant Explorer | Legendary Creature | Beast Noble | You may play an additional land on each of your turns. {4}{G}{G}, {T}: Look at the top six cards of your library. You may reveal a creature card with mana value less than or equal to the number of lands you control from among them and put it onto the battlefield. Put the rest on the bottom in a random order. | Arif Wijaya

Mossborn Hydra | Creature | Elemental Hydra | Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) This creature enters with a +1/+1 counter on it. Landfall — Whenever a land you control enters, double the number of +1/+1 counters on this creature. | Monztre

Needletooth Pack | Creature | Dinosaur | Morbid — At the beginning of your end step, if a creature died this turn, put two +1/+1 counters on target creature you control. | Monztre

Quakestrider Ceratops | Creature | Dinosaur | | Josiah "Jo" Cameron

Quilled Greatwurm | Creature | Wurm | Trample Whenever a creature you control deals combat damage during your turn, put that many +1/+1 counters on it. (It must survive to get the counters.) You may cast this card from your graveyard by removing six counters from among creatures you control in addition to paying its other costs. | Michal Ivan

Spinner of Souls | Creature | Spider Spirit | Reach Whenever another nontoken creature you control dies, you may reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order. | Xavier Ribeiro

Treetop Snarespinner | Creature | Spider | Reach (This creature can block creatures with flying.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) {2}{G}: Put a +1/+1 counter on target creature you control. Activate only as a sorcery. | Steve Ellis

Affectionate Indrik | Creature | Beast | When Affectionate Indrik enters, you may have it fight target creature you don't control. (Each deals damage equal to its power to the other.) | Steve Prescott

Dwynen, Gilt-Leaf Daen | Legendary Creature | Elf Warrior | Reach Other Elf creatures you control get +1/+1. Whenever Dwynen, Gilt-Leaf Daen attacks, you gain 1 life for each attacking Elf you control. | Johannes Voss

Dwynen's Elite | Creature | Elf Warrior | When Dwynen's Elite enters, if you control another Elf, create a 1/1 green Elf Warrior creature token. | Volkan Baǵa

Elvish Archdruid | Creature | Elf Druid | Other Elf creatures you control get +1/+1. {T}: Add {G} for each Elf you control. | Karl Kopinski

Ghalta, Primal Hunger | Legendary Creature | Elder Dinosaur | This spell costs {X} less to cast, where X is the total power of creatures you control. Trample | Chase Stone

Gnarlid Colony | Creature | Beast | Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) If Gnarlid Colony was kicked, it enters with two +1/+1 counters on it. Each creature you control with a +1/+1 counter on it has trample. | Izzy

Llanowar Elves | Creature | Elf Druid | {T}: Add {G}. | Kev Walker

Mild-Mannered Librarian | Creature | Human | {3}{G}: Mild-Mannered Librarian becomes a Werewolf. Put two +1/+1 counters on it and you draw a card. Activate only once. | Justyna Dura

Nessian Hornbeetle | Creature | Insect | At the beginning of combat on your turn, if you control another creature with power 4 or greater, put a +1/+1 counter on Nessian Hornbeetle. | Jason Felix

Reclamation Sage | Creature | Elf Shaman | When Reclamation Sage enters, you may destroy target artifact or enchantment. | Christopher Moeller

Scavenging Ooze | Creature | Ooze | {G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life. | Austin Hsu

Wary Thespian | Creature | Cat Druid | When Wary Thespian enters or dies, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.) | Billy Christian

Wildwood Scourge | Creature | Hydra | Wildwood Scourge enters with X +1/+1 counters on it. Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on Wildwood Scourge. | Bryan Sola

Good-Fortune Unicorn | Creature | Unicorn | Whenever another creature you control enters, put a +1/+1 counter on that creature. | Kee Lo

Koma, World-Eater | Legendary Creature | Serpent | This spell can't be countered. Trample, ward {4} Whenever Koma deals combat damage to a player, create four 3/3 blue Serpent creature tokens named Koma's Coil. | Mark Zug

Zimone, Paradox Sculptor | Legendary Creature | Human Wizard | At the beginning of combat on your turn, put a +1/+1 counter on each of up to two target creatures you control. {G}{U}, {T}: Double the number of each kind of counter on up to two target creatures and/or artifacts you control. | Nathaniel Himawan

Tatyova, Benthic Druid | Legendary Creature | Merfolk Druid | Landfall — Whenever a land you control enters, you gain 1 life and draw a card. | Mathias Kollros

Wardens of the Cycle | Creature | Elf Warlock | Morbid — At the beginning of your end step, if a creature died this turn, choose one — • You gain 2 life. • You draw a card and you lose 1 life. | Caroline Gariba

Lathril, Blade of the Elves | Legendary Creature | Elf Noble | Menace Whenever Lathril, Blade of the Elves deals combat damage to a player, create that many 1/1 green Elf Warrior creature tokens. {T}, Tap ten untapped Elves you control: Each opponent loses 10 life and you gain 10 life. | Caroline Gariba

Ashroot Animist | Creature | Lizard Druid | Trample When this creature attacks, another target creature you control gains trample and gets +X/+X until end of turn, where X is this creature's power. | Caio Monteiro

Ruby, Daring Tracker | Legendary Creature | Human Scout | Haste Whenever Ruby, Daring Tracker attacks while you control a creature with power 4 or greater, Ruby gets +2/+2 until end of turn. {T}: Add {R} or {G}. | Ekaterina Burmak

Muldrotha, the Gravetide | Legendary Creature | Elemental Avatar | During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard. (If a card has multiple permanent types, choose one as you play it.) | Jason Rainville

Progenitus | Legendary Creature | Hydra Avatar | Protection from everything If Progenitus would be put into a graveyard from anywhere, reveal Progenitus and shuffle it into its owner's library instead. | Jaime Jones