Exile All Hallow's Eve with two scream counters on it.

At the beginning of your upkeep, if All Hallow's Eve is exiled with a scream counter on it, remove a scream counter from it. If there are no more scream counters on it, put it into your graveyard and each player returns all creature cards from their graveyard to the battlefield.

, : Reveal a creature card in your hand. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.

When this creature transforms into Blightsower Thallid or dies, create a 1/1 green Phyrexian Saproling creature token.

Whenever Bloodhall Priest enters the battlefield or attacks, if you have no cards in hand, Bloodhall Priest deals 2 damage to any target.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

First strike, reach

Whenever Catti-brie of Mithral Hall attacks, put a +1/+1 counter on it for each Equipment attached to it.

, Remove all +1/+1 counters from Catti-brie: It deals X damage to target attacking or blocking creature an opponent controls, where X is the number of counters removed this way.

Enchant player

Whenever a player attacks enchanted player with one or more creatures, that attacking player may create a tapped 2/2 black Zombie creature token.

At the beginning of your upkeep, put a spore counter on Deathspore Thallid.

Remove three spore counters from Deathspore Thallid: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Target creature gets -1/-1 until end of turn.

Look at the top ten cards of your library, exile up to two creature cards from among them, then shuffle. Target opponent may choose one of the exiled cards and put it onto the battlefield under their control. Put the rest onto the battlefield under your control.

Whenever another creature you control dies, put a +1/+1 counter on Gavony Unhallowed.

Great Hall of Starnheim enters the battlefield tapped.

: Add .

, , Sacrifice Great Hall of Starnheim and a creature you control: Create a 4/4 white Angel Warrior creature token with flying and vigilance. Activate only as a sorcery.

Hall enters the battlefield tapped.

: Add or .

, : Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

Visit — Choose target creature you control. Each other creature you control becomes a copy of that creature until end of turn, except it isn't legendary.

Lights — 2, 6

If you control two or more other lands, Hall of Storm Giants enters the battlefield tapped.

: Add .

: Until end of turn, Hall of Storm Giants becomes a 7/7 blue Giant creature with ward . It's still a land. (Whenever it becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

Hall of the Bandit Lord enters the battlefield tapped.

, Pay 3 life: Add . If that mana is spent on a creature spell, it gains haste.

Trample

Whenever you cast a spell, if that spell was kicked, put a +1/+1 counter on Hallar, the Firefletcher, then Hallar deals damage equal to the number of +1/+1 counters on it to each opponent.

Put all creatures on the bottom of their owners' libraries.

: Return target nonsnow land you control to its owner's hand.

: Prevent the next 2 damage that would be dealt to any target this turn.

Threshold — : Prevent the next 4 damage that would be dealt to any target this turn. Activate only if seven or more cards are in your graveyard.

Whenever you gain life, put a +1/+1 counter on Hallowed Priest.

Vigilance

When Hallowed Spiritkeeper dies, create X 1/1 white Spirit creature tokens with flying, where X is the number of creature cards in your graveyard.

Equipped creature gets +1/+1 for each creature you control.

Equip

You may have Mirrorhall Mimic enter the battlefield as a copy of any creature on the battlefield, except it's a Spirit in addition to its other types.

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

At the beginning of your upkeep, put a spore counter on Psychotrope Thallid.

Remove three spore counters from Psychotrope Thallid: Create a 1/1 green Saproling creature token.

, Sacrifice a Saproling: Draw a card.

All creatures able to block target creature this turn do so.

Ferocious — That creature gains indestructible until end of turn if you control a creature with power 4 or greater.

Discard a card: Tap Seasoned Hallowblade. It gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Return the top creature card of your graveyard to the battlefield. That creature gains haste until end of turn. Exile it at the beginning of the next end step.

Each other creature you control that's a Fungus or Saproling gets +1/+1.

: Add .

, : Stensia Bloodhall deals 2 damage to target player or planeswalker.

All creatures able to block target creature this turn do so.

At the beginning of your upkeep, put a spore counter on Thallid Devourer.

Remove three spore counters from Thallid Devourer: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Thallid Devourer gets +1/+2 until end of turn.

, Sacrifice another creature: Thallid Omnivore gets +2/+2 until end of turn. If a Saproling was sacrificed this way, you gain 2 life.

, Sacrifice a creature: Draw a card.

When Tukatongue Thallid dies, create a 1/1 green Saproling creature token.

Enchant creature

When enchanted creature dies, return that card to the battlefield under your control.

At the beginning of your upkeep, put a spore counter on Vitaspore Thallid.

Remove three spore counters from Vitaspore Thallid: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Target creature gains haste until end of turn.