Heartless Act

Choose one —
• Destroy target creature with no counters on it.
• Remove up to three counters from target creature.

Chea, Friend to Maybe Too Many

Familiar spells you cast have flash. (Bats, Birds, Cats, Dragons, Faeries, Foxes, Frogs, Imps, Lizards, and Spiders are familiars, as well as any creature with "Familiar" in its name.)
{T}: Add X {G} and each opponent loses X life, where X is the number of familiars you control.

Swamp

Phyrexian Missionary

Kicker {1}{B} (You may pay an additional {1}{B} as you cast this spell.)
Lifelink
When Phyrexian Missionary enters, if it was kicked, return target creature card from your graveyard to your hand.

Druid's Familiar

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Druid's Familiar is paired with another creature, each of those creatures gets +2/+2.

Elfhame Palace

Elfhame Palace enters tapped.
{T}: Add {G} or {W}.

Ancestor Dragon

Flying
Whenever one or more creatures you control attack, you gain 1 life for each attacking creature.

Plains

Knight of Lost Causes

Vigilance
As long as you are way behind, Knight of Lost Causes gets +3/+3 and has indestructible. (You are way behind if, at any point during this turn, an opponent had 10 or more life than you, controlled at least three more creatures than you, or had at least three more cards in hand than you.)

Reconnaissance

{0}: Remove target attacking creature you control from combat and untap it. (If you activate during end of combat, the creature will untap after it deals combat damage.)

Kor Cartographer

When Kor Cartographer enters, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Mistmeadow Skulk

Lifelink, protection from mana value 3 or greater

Banishing Light

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

You Hear Something on Watch

Choose one —
• Rouse the Party — Creatures you control get +1/+1 until end of turn.
• Set Off Traps — This spell deals 5 damage to target attacking creature.

Creepy Crawler

Menace, reach
Whenever Creepy Crawler deals combat damage to a player who is afraid of you, that player discards a card and you draw a card. (An opponent is afraid of you if a Horror, Nightmare, enchantment, or face-down creature you control entered the battlefield or attacked them this turn.)

Ministrant of Obligation

Afterlife 2 (When this creature dies, create two 1/1 white and black Spirit creature tokens with flying.)

Kozilek, Compleated

({C/P} can be paid with either {C} or 2 life.)
When you cast this spell, each opponent gets two poison counters, then each opponent with more than two cards in hand discards cards equal to the difference.
Annihinfect (Whenever this creature attacks, defending player sacrifices a permanent for each poison counter they have.)

Slaughter the Strong

Each player chooses any number of creatures they control with total power 4 or less, then sacrifices all other creatures they control.

Fairgrounds Warden

When Fairgrounds Warden enters, exile target creature an opponent controls until Fairgrounds Warden leaves the battlefield.

Forest

Ikra Shidiqi, the Usurper

Menace
Whenever a creature you control deals combat damage to a player, you gain life equal to that creature's toughness.
Partner (You can have two commanders if both have partner.)

Authority of the Consuls

Creatures your opponents control enter tapped.
Whenever a creature an opponent controls enters, you gain 1 life.

Snow-Covered Swamp

Dromoka's Command

Choose two —
• Prevent all damage target instant or sorcery spell would deal this turn.
• Target player sacrifices an enchantment of their choice.
• Put a +1/+1 counter on target creature.
• Target creature you control fights target creature you don't control.

Temple Acolyte

When Temple Acolyte enters, you gain 3 life.

Pernicious Deed

{X}, Sacrifice Pernicious Deed: Destroy each artifact, creature, and enchantment with mana value X or less.

Profane Insight

You draw a card and you lose 1 life. (Then exile this card. You may cast the creature later from exile.)