Magnetic Keyword Guide – New Mechanic From The Boomsday Project

The upcoming Hearthstone expansion, The Boomsday Project, is going to feature a new keyword – Magnetic. It’s an entirely new mechanic centered around Mechs. It means that Boomsday Project will be the first expansion since Goblins vs Gnomes to be centered around the Mech tribe. In this guide, we’ll gather all the information about new keyword, and all the new cards featuring it.

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Magnetic Keyword

While Magnetic is a new mechanic, it actually works very similarly to buffs. Cards with Magnetic can “fuse” with another Mech you already have on the battlefield. For example, fusing the new Spider Bomb with Mechwarper would end up creating a 4/5 Mech with “Your Mechs cost (1) less. Deathrattle: Destroy a random enemy minion.” Mechs with Magnetic can work on their own, or they can be used as a way to buff a Mech! Here’s what we know about the mechanic so far:

  • Cards with Magnetic can be played like a normal card too, ignoring the keyword.
  • In order to fuse, play Magnetic card to the LEFT of a Mech. If you play it to the right, nothing happens.
  • Fusing counts as a buff. The resulting Mech will have combined stats of both minions, as well as effects of both.
  • If the card gets Silenced, the extra stats and all of the effects disappear. You just get the base, Silenced Mech. It works exactly like you would Silence a regular buff, such as Spikeridged Steed.
  • You can fuse a Magnetic card into any Mech – it doesn’t have to be Magnetic too.
  • If a Mech on the board can attack, fusing a Mech into it won’t change that (it will still be able to attack). It doesn’t create a new minion, but rather buffs the existing one.

Hearthside Chat

Learn more about the mechanic via this Hearthside Chat video where they showed off three new Magnetic cards!

List of Magnetic Cards


A Hearthstone player and writer from Poland, Stonekeep has been in a love-hate relationship with Hearthstone since Closed Beta. Over that time, he has achieved many high Legend climbs and infinite Arena runs. He's the current admin of Hearthstone Top Decks.

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Leave a Reply


  1. MasterSace
    August 7, 2018 at 10:14 pm

    So how does the magnetic keyword interact with summon counts, like the warrior quest, if you buff a mech originally does not have taunt with a taunt magnetic mech, will it count towards the mission? If you buff a mech already having taunt with a magnetic taunt mech, will it count towards the quest?

  2. Hearthsono
    July 31, 2018 at 10:10 pm

    What happens with kangor’s endless army if a magnetic minion gets silenced? Does it keep the buff or nah?

  3. Yahko
    July 30, 2018 at 12:26 am

    Just to clarify what you have said. You mentioned that it will likely be a spell when positioned to the left of a magnetic minion, right?

    “They don’t split. The extra stats and effect is counted as a buff. When you Silence it, the extra stats and all of the effects disappear, and the base minion stays there. It’s like you buffed something with Spikeridged Steed and then it got Silenced ?”

    Will it count as a buff for Lynessa?

  4. PROJECTInsomnia
    July 28, 2018 at 9:18 am

    How does it work with Handbuffed Magnetic minions? For example if you trigger the Deathrattle of Val’Anyr and it attaches to a magnetic minion and then play it, will it transfer the +4/+2 + deathrattle too? If yes, how does it work with the legendary Paladin spell? Will the resummoned minions only have the combined text of the fused minions or also the Val’anyr death rattle + stats?

  5. JamJack
    July 27, 2018 at 4:59 am

    And what about secret triggerings (Explosive Runes, Frozen Clone, Snipe etc.)? Do mechs magnetizing with another on the board counts as minions played, or just as a buff, but not a spell (no triggering Counterspell)? Maybe it just counts as totally another type of card (like Death Knights or sth)?

    • Stonekeep - Site Admin
      July 27, 2018 at 7:24 am

      I’m pretty sure that it doesn’t count as a minion (e.g. doesn’t trigger cards like Explosiv Runes), nor as a spell (for the sake of Counterspell etc.)

  6. Nick
    July 18, 2018 at 10:38 am

    Does fusing a mech count as a spell for The Last Kaleidosaur? Excited about a Galvy / Mechs / Corpsetaker deck 🙂

    • Stonekeep - Site Admin
      July 18, 2018 at 4:08 pm

      Not really. It’s only works like a spell, but it doesn’t count as one. For example, Counterspell won’t stop it, and it won’t generate a Fireball with Antonidas on the board.

  7. Deanvk
    July 17, 2018 at 10:46 am

    So, just to be clear – once you’ve attached a magnetic minion to an existing mech, the magnetic minion goes away and the mech now has the stats and text of both cards, correct?

  8. John
    July 13, 2018 at 5:23 am

    The placement thing is quite important and makes positioning much more interesting. I think they could have done it with the choice screen like when u are playing lets say – Wrath. But this way its weaker and its a “tax” for using it. Imagine u have 2 same mechs and oppenent will also choose which one to attack to lower his health according to the possition for further possible fuses. It relly brings nice new elements into the game.

    What i woder about is the itneraction with triggering secrets. I would say its always counted as minion and even if it fuses, ur opponent will get normal copy of the minion with mirror entity. Just my guess.

  9. RocketMan16
    July 11, 2018 at 1:26 pm

    Does this work like a battlecry? Or will summoning a magnetized mech next to an existing mech apply the buff?

    • Stonekeep - Site Admin
      July 12, 2018 at 2:07 am

      In order to activate Magnetized, you need to play it right LEFT to the Mech you want to combine with. Any other placement will result in dropping it as a regular minion.

  10. JoyDivision
    July 11, 2018 at 8:25 am

    I can’t wait to see how many players (especially in Arena mode during the first days of the new expansion) forget how ‘magnetizing placement’ works. 🙂

  11. Matthew Halkos
    July 11, 2018 at 6:50 am

    What happens when you have 2 mechs on the board and place a magnetic in the middle?

    • JoyDivision
      July 11, 2018 at 8:25 am

      It magnetizes with the right one!?

    • Stonekeep - Site Admin
      July 12, 2018 at 2:08 am

      You need to play Magnetize Mech on the LEFT SIDE of the Mech you want to fuse it. So if you put it in the middle, the right one will be buffed (because you put Magnetize on the left side of it) and the other one will remain intact.

  12. Thrombin
    July 11, 2018 at 6:05 am

    Saying “it can attack immediately” is a bit misleading. It can’t attack immediately if the original mech you’re fusing with can’t!

  13. burnqpund
    July 10, 2018 at 8:52 pm

    I have a hunch that they’re going to have cards similar to Mimiron’s Head that you can attach cards together. This expansion might be GvG 2.0

  14. Edge
    July 10, 2018 at 8:47 pm

    In the case of the Spider Bomb after you’ve buffed another mech… what happens if your opponent hits it with silence? Naturally, silence affects the deathrattle and the buff, but what about the minion itself? Will they be forced to split into the two original minions because Magnetic would be silenced as well?

    In the example with mechwarper, am I right to assume that if they do split, both minions are silenced?

    • Stonekeep - Site Admin
      July 11, 2018 at 2:52 am

      They don’t split. The extra stats and effect is counted as a buff. When you Silence it, the extra stats and all of the effects disappear, and the base minion stays there. It’s like you buffed something with Spikeridged Steed and then it got Silenced 🙂

      • Edge
        July 12, 2018 at 7:02 pm

        I see, so if you trigger magnetic, the minion essentially becomes a spell card (like Spikeridged Steed). Thanks for the clarification

    • JoyDivision
      July 11, 2018 at 8:23 am

      I think it will be as simple as ‘all enhancements provided by the magnetizing card disappear’.

      So if you magnetize a 2/2 vanilla mech with Spider Bomb and it gets silenced, well … it’s a 2/2 vanilla mech once again.

  15. Viggie
    July 10, 2018 at 10:15 am

    You can attack immediately. There’s a video on the office boomsday website.

    From the website:
    “Magnetic” minions can fuse with other mechs, to combine stats and other keywords. To fuse, play the magnetic minion to the LEFT of the minion you want to fuse with.

    • Getbacker
      July 10, 2018 at 2:51 pm

      What if I want to play the minion to the left of the mech for positioning and I don’t want it to fuse?? Does it mean I have no choice? Sounds strange Blizzard would overlook this.

      • JoyDivision
        July 11, 2018 at 8:31 am

        That’s the way it’ll work. Or ‘the price you’ll have to pay for magnetizing’. 😉

        Time will tell if this will make mech positioning awkward or if it doesn’t matter at all.

        I wonder why it’s not possible to simply give a choice, regardless of where a mech is positioned on the board. Some sort of battlecry targeting a mech plus a ‘play as a creature instead’ button …

        • Stonekeep - Site Admin
          July 12, 2018 at 2:13 am

          On the one hand, it means that you need to pay even more attention to your positioning now – where you put your Mechs might be more important. It also looks pretty cool that way.

          On the other hand, it could be more clear and flexible. When playing a Mech with Magnetize, it could just pop up a “Choose One” window, where you pick whether you want to play it alone or Magnetize it into something (that option would be greyed out if there was no Mech you could Magnetize into).

  16. Pablopiola
    July 10, 2018 at 7:41 am

    If you have a X-mech since your last turn, and you play a minion with Magnetic to enhance it’s stats… Can you attack inmediatly with the enhanced “X-mech fused with the Magnetic mech”? Or is “summoning sickness” part of the combined effects?

    • Stonekeep - Site Admin
      July 10, 2018 at 7:44 am

      It’s a great question, but I’m afraid that we don’t know that yet. We’ll update the post once we find out!

    • Stonekeep - Site Admin
      July 10, 2018 at 10:37 am

      Update: It seems that a fused Mech can attack immediately! It doesn’t create a new minion, but rather “buff” the existing one.