Ancestral Mask (3)
Enchantment — Aura

Enchant creature
Enchanted creature gets +2/+2 for each other enchantment on the battlefield.

Animate Dead (2)
Enchantment — Aura

Enchant creature card in a graveyard
When Animate Dead enters the battlefield, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with Animate Dead." Return enchanted creature card to the battlefield under your control and attach Animate Dead to it. When Animate Dead leaves the battlefield, that creature's controller sacrifices it.
Enchanted creature gets -1/-0.

Argothian Enchantress (2)
Creature — Human Druid (0/1)

Shroud (This creature can't be the target of spells or abilities.)
Whenever you cast an enchantment spell, draw a card.

Armadillo Cloak (3)
Enchantment — Aura

Enchant creature
Enchanted creature gets +2/+2 and has trample.
Whenever enchanted creature deals damage, you gain that much life.

Aven Riftwatcher (3)
Creature — Bird Rebel Soldier (2/3)

Flying
Vanishing 3 (This creature enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When Aven Riftwatcher enters the battlefield or leaves the battlefield, you gain 2 life.

Balance (2)
Sorcery

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Battle Squadron (5)
Creature — Goblin **

Flying
Battle Squadron's power and toughness are each equal to the number of creatures you control.

Beetleback Chief (4)
Creature — Goblin Warrior (2/2)

When Beetleback Chief enters the battlefield, create two 1/1 red Goblin creature tokens.

Blood Artist (2)
Creature — Vampire (0/1)

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Bloodbraid Elf (4)
Creature — Elf Berserker (3/2)

Haste
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

Borderland Marauder (2)
Creature — Human Warrior (1/2)

Whenever Borderland Marauder attacks, it gets +2/+0 until end of turn.

Brago, King Eternal (4)
Legendary Creature — Spirit Noble (2/4)

Flying
Whenever Brago, King Eternal deals combat damage to a player, exile any number of target nonland permanents you control, then return those cards to the battlefield under their owner's control.

Brawn (4)
Creature — Incarnation (3/3)

Trample
As long as Brawn is in your graveyard and you control a Forest, creatures you control have trample.

Burning Vengeance (3)
Enchantment

Whenever you cast a spell from your graveyard, Burning Vengeance deals 2 damage to any target.

Call the Skybreaker {UR}{UR} (7)
Sorcery

Create a 5/5 blue and red Elemental creature token with flying.
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Carbonize (3)
Instant

Carbonize deals 3 damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.