Jump Scare! Upgrade Guide

Quick verdict

Jump Scare! is a Simic ramp deck that turns every land drop into a 2/2 body and every second land drop into a free flip of a face-down creature. Zimone, Mystery Unraveler rewards playing two lands a turn, and the deck has enough ramp and extra land drops to do it most turns. It gets held back by a handful of eight-mana spells that can't use Zimone's free flip, a slow mana base, and too few cheap ways to stop an opponent.

TurnZero HQ rates Jump Scare! a 3 out of 5 on difficulty and a 3 out of 5 on power, as it comes in the box. That is our editorial read, not an official Wizards rating. The full hundred cards are on the Jump Scare! decklist page, and every other precon we cover is on the precon directory.

How the precon plays

Zimone, Mystery Unraveler has one landfall ability that does two different things. The first time it resolves each turn, you manifest dread: look at the top two cards of your library, put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Every landfall after that in the same turn lets you turn a permanent you control face up instead, and Zimone doesn't charge you the mana cost to do it.

That second trigger is where the deck gets its power. A face-down Worldspine Wurm or Hydra Omnivore is a 2/2 until a second land enters, and then it is the real creature without you paying for it. Extra land drops from Aesi, Tyrant of Gyre Strait , Growth Spiral and Eureka Moment , fetch effects like Evolving Wilds , and the bounce from Simic Growth Chamber all line up a second trigger.

The face-down creatures also feed the card draw. They Came from the Pipes draws a card whenever a face-down creature enters, Glitch Interpreter draws when colorless creatures connect, and Curator Beastie makes each face-down 2/2 enter as a 4/4, since face-down creatures are colorless.

What works out of the box

Zimone, Mystery Unraveler ↗

Turns the first land each turn into a face-down 2/2 and every later land into a free flip, so playing two lands a turn is both card advantage and mana you don't have to spend.

Aesi, Tyrant of Gyre Strait ↗

An extra land drop every turn and a card for each land that enters. It sets up Zimone's second trigger by itself and refills the hand while doing it.

Tatyova, Benthic Druid ↗

Draws a card and gains a life on every landfall. With fetch lands and extra land drops it is often two or three cards a turn.

They Came from the Pipes ↗

Manifests dread twice when it enters, then draws a card whenever a face-down creature enters. Zimone alone triggers it every turn.

Curator Beastie ↗

Colorless creatures enter with two extra +1/+1 counters, which covers every face-down creature. It also manifests dread when it enters and whenever it attacks.

Growing Dread ↗

Two mana with flash to manifest dread, and every permanent you turn face up gets a +1/+1 counter. Zimone's free flips make it a steady source of counters.

What needs improvement

The deck has several spells that cost eight mana and get nothing from Zimone. A face-down creature card can be flipped for free, so a big creature has an excuse for its cost. Ezuri's Predation and Sandwurm Convergence are not creatures, so they can only ever be hard-cast, and by the time you have eight mana the deck should already be ahead on board.

Interaction is thin and slow. Counterspell , Reality Shift and Beast Within are good, but Aether Gale and Zimone's Hypothesis both cost five and are awkward to aim. The mana base also has five lands that enter tapped or produce colorless, which slows the early ramp that gets Zimone out on time. See the land and mana base guide for how to judge each land.

Upgrade ideas

Each upgrade below starts from something the deck does poorly and says what a replacement card has to do. The cards named are examples, not the only answer: if you own something else that does the same job, or a newer printing does it better, it goes in the same slot. Make one change at a time and play a few games between them, so you can tell which change helped. The general method is in how to upgrade a Commander precon →

1. Play two lands every turn

Zimone's best trigger is the second landfall in a turn. The more turns you get two lands down, the more face-down creatures you turn up for free.

What to look for Cheap permanents that grant an extra land drop each turn, or let you play lands from the top of your library so you don't run out of lands to drop.

Cut, for example

✕

Scroll of Fate Three mana and a tap to manifest one card from your hand. Zimone already manifests every turn, and this spends a card from your hand to do it.

✕

Body of Knowledge A five-mana creature whose size depends on your hand, which this deck empties by playing lands. It does little to support the landfall plan.

Add, for example

Exploration ↗

One mana for an extra land drop on each of your turns. It is the cheapest way to get Zimone's second trigger online.

Azusa, Lost but Seeking ↗

Three mana for two additional land drops each turn. On a turn with lands in hand it can trigger landfall three times.

Dryad of the Ilysian Grove ↗

An extra land drop each turn on a 2/4 body that also fixes your colors, since your lands become every basic land type.

2. Swap eight-mana spells for cheap landfall payoffs

Noncreature eight-drops can't be flipped by Zimone and arrive late. Cheap landfall creatures pay you back from the first turn they're out.

What to look for Creatures costing two to six mana with a landfall trigger that makes mana, tokens or cards. Creature cards also get to be flipped for free if they're manifested.

Cut, for example

✕

Ezuri's Predation Eight mana to make 4/4s that fight each opposing creature. Strong when it resolves, but it is a sorcery that Zimone can never flip for free.

✕

Sandwurm Convergence Eight mana for an enchantment that makes a 5/5 each end step and stops fliers attacking you. It comes down too late to matter in most games.

Add, for example

Lotus Cobra ↗

Adds a mana of any color whenever a land enters. With fetch lands and extra land drops it turns each land into two mana.

Tireless Provisioner ↗

Makes a Treasure or a Food on every landfall. The Treasures ramp you early and the Food buys life later.

Rampaging Baloths ↗

A 6/6 trampler that makes a 4/4 Beast whenever a land enters. A manifested copy is also a free flip for Zimone.

3. Cheaper interaction

The deck's answers to an opponent's spell or creature are mostly five-mana sorceries. One-mana and two-mana answers let you keep developing and still respond.

What to look for Instant-speed removal or counterspells costing one or two mana, so you can hold one up on the turn you play your lands.

Cut, for example

✕

Zimone's Hypothesis Five mana to bounce every creature with odd or even power. It is hard to aim, and it often returns your own face-down 2/2s too.

✕

Aether Gale Five mana to bounce six permanents at sorcery speed. It buys a turn, but the opponents replay everything and you have spent your turn.

Add, for example

Pongify ↗

One mana at instant speed to destroy a creature, leaving its controller a 3/3 Ape.

Rapid Hybridization ↗

The same deal as Pongify: one mana, destroy target creature, its controller gets a 3/3.

Arcane Denial ↗

Two mana to counter any spell. You draw a card and the opponent draws up to two, which is a fair trade for stopping a board wipe.

4. Fix the mana base with lands that trigger twice

A fetch land that enters untapped and puts a basic onto the battlefield is two landfall triggers from one land drop, which is exactly what Zimone wants. Three slow lands in the deck can make room.

What to look for Lands that sacrifice to fetch a basic onto the battlefield, or dual lands that can enter untapped from turn one.

Cut, for example

✕

Temple of the False God Produces no mana until you control five lands, which is the opposite of what a ramp deck needs early.

✕

Thornwood Falls Enters tapped for one life. The deck has enough taplands already.

✕

Quandrix Campus Enters tapped, and its scry costs five mana in total to use.

Add, for example

Fabled Passage ↗

Fetches a basic onto the battlefield, so one land drop triggers landfall twice. Once you have four lands the fetched land untaps.

Prismatic Vista ↗

Fetches a basic onto the battlefield untapped for one life, giving Zimone both triggers off a single land drop.

Breeding Pool ↗

A green-blue dual that enters untapped if you pay 2 life, and it has both basic land types for cards that care.

Win conditions

Most games end with a board of creatures that were flipped face up for nothing. Get two lands down a turn, let Zimone, Mystery Unraveler manifest and flip Hydra Omnivore , Shriekwood Devourer or Worldspine Wurm , then swing with Overwhelming Stampede or Thunderfoot Baloth giving the team trample. Rampaging Baloths and Tireless Provisioner from the upgrades add more bodies and mana to that plan.

Who should buy this precon

A fit for a player who already knows the basics and enjoys sequencing a turn. You track which face-down cards are creatures, decide which to flip and when, and plan your land drops around Zimone's two triggers. It is a moderate step up from a simple ramp deck, and it rewards a player who likes ramp and big creatures but wants more decisions than casting them one at a time.

Checked against the printed decklist on October 10, 2026.