Chromium, the Mutable


Format Legality
Pre-release Legal
Tiny Leaders Legal
Magic Duels Legal
Canadian Highlander Legal
Vintage Legal
Modern Legal
Standard Legal
Leviathan Legal
Legacy Legal
Brawl Legal
1v1 Commander Legal
Duel Commander Legal
Unformat Legal
Casual Legal
Commander / EDH Legal

Printings View all

Set Rarity
Core Set 2019 (M19) Mythic Rare

Combos Browse all

Chromium, the Mutable

Legendary Creature — Elder Dragon


This spell can't be countered.


Discard a card: Until end of turn, Chromium, the Mutable becomes a Human with base power and toughness 1/1, loses all abilities, and gains hexproof. It can't be blocked this turn.

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Chromium, the Mutable Discussion

bj_bancroft on Chromium the Mutable + Octopus ...

1 week ago

If I enchant Chromium, the Mutable with Octopus Umbra, will he be a 1/1 or an 8/8 after using his ability and discarding a card?

Feltrix on Dimir Control Forever

2 weeks ago

DeviousPenguin666 There are a lot of decks where I like Notion Rain better than Chemister's Insight, but what I really love is holding Chemister's Insight and Sinister Sabotage. I also like Thought Erasure because I live in fear of Chromium, the Mutable and Carnage Tyrant.

Argy on Esper Control

3 weeks ago

That's been the usual school of thought.

If you look at Vona, Butcher of Magan it can eventually outpace Nezahal, Primal Tide.

If it keeps destroying Nezahal, Primal Tide there are only so many times you can Discard three cards from hand to protect it.

You also aren't casting any Non-Creature spells with Vona. You're activating an ability.

The Lifelink on it would also help in the mirror match.

I'd love to speak with the builders of this deck. It's unusual with 27 lands, but they make sense as sac outlets to protect Chromium, the Mutable.

I'd say they found that Vona has proven to be the best option in testing.

cdkime on Chromium the mutable + silverblade ...

4 weeks ago

Yes. The Chromium, the Mutable is still the same object, so it's still Soulbound to the Silverblade Paladin.

Also, note that Soulbond does not target, so Hexproof and Shroud do not interact with your ability to Soulbond a creature.

sylvannos on How does a deck like ...

1 month ago

The thing is that you don't cast your win condition until you can protect it by either nuking your opponent's entire board or just have so much countermagic/removal they couldn't stop it.

Even if you have the mana on turn 7, it's better to just wait it out before casting Chromium, the Mutable. Control advances its board state by playing lands and keeping the opponent's side clear. Just because you can cast something as the control player doesn't mean you should.

TMBRLZ on How does a deck like ...

1 month ago

I see you too are a fan of Mr. Rosum. He played super well this weekend.

But you're essentially right. Go to unstoppable beats with Chromium, the Mutable, infinitely loop Teferi, Hero of Dominaria, or (most commonly) watch your opp concede cause they're sick of your crap.

Argy on Esper Control Rotation

1 month ago

So I drew land after land in the game I just tested against you. Mostly because I had Dragon's Hoard and 2x Arch of Orazca on the field.

You used Planar Cleansing to get rid of all my Creatures, including Lathliss, Dragon Queen, but you eventually just had to make difficult decisions as to how to spend your mana.

I, on the other hand, had nine mana so I cast Fight with Fire for it's kicked cost. You were on 19 because I'd chipped you once with Dragon Hatchling. You only had one land untapped due to playing cards to destroy my Creatures on your turn (like Walk the Plank).

Now you were on 10. You only had one land untapped. I chipped you with another Dragon Hatchling I had played after the board wipe. You were now on 9 life.

You had to decide how to spend your six mana. There are benefits to drawing a lot of lands. You decided to cast Chromium, the Mutable. You had no Counter spells in hand.

I drew another Fight with Fire, kicked it, and hit you for nine direct damage for lethal.

After that game I would Sideboard 3x Banefire and 3x Goblin Chainwhirler in and remove 1x Sarkhan, Fireblood, 2x Shock, and 3x Lightning Strike.

If you're going to actually play this deck I would suggest that you put more draw options in it. Arguel's Blood Fast  Flip, for a start.

You also need at least 25 land so you don't get mana screwed. Some people use 26 for Control decks.

It's a fairly pointless exercise to build a deck you think will beat someone else's. That won't win you many FNMs.

You have to build a deck that can work in your local meta.

ANYONE can build a deck designed to beat one other person's.

I will also give you some playtesting tips:

  1. Work out a random way to decide which deck will play first. I use the dice roll simulator on TappedOut. The deck on the left of my screen is always even numbers, and the other one is always odd.

  2. Never make your final assessment of how two decks have fared against each other until you have played at least three games, Sideboarding between each one.

    It can be REALLY tricky to work out how to Sideboard a deck you haven't built. Try to see if the brewer has put any tips for how to Sideboard on their Description.

    Most brewers are really happy to tell you how they would actually Sideboard against your deck, if you ask them.

  3. As I said earlier, I ALWAYS get my deck to make stupid mistakes when testing. You need to see if your deck can win, even if you screw up.

I am actually trying to help you be a better builder and player.

You have some great ideas, but seem to lack some knowledge of cards that might help you out, and how to build Sideboards.

I used to give deck assistance on TappedOut all the time but I got tired of it and stopped.

(That's why my decks often get a lot of votes. People seem to like the different stuff I try, and the reasons why I do that.)

You are one of the few people I am helping at the moment.

If you don't want me to just say, and I will leave you to it.

Skyler1776 on Sarkhan's Dragon Den

1 month ago


I just tested this against a custom deck I created, a Esper Control deck. It went 2-1 against yours, and only because of mana issues in game 1. I was able to flash in Chromium, the Mutable, the only creature in the deck, to block and Counter Sarkhan and Lathliss in game 1 with Mainboard Sycopates. The one thing I noticed is that your deck got mana-flooded all 3 times, and that cards like Moment of Craving and Cleansing Nova, which I mainboard, took care of your creatures quite easy. All but 3 of your creatures have 2 toughness, leaving them susceptible to some of the more hard-core removal like Ritual of Soot. What do you Sideboard in against that kind of Matchup?

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