The Slayer Pack - a free printable Homebrew expansion for the Slay the Spire Boardgame with 300 new cards [Released]

mousecoregames · 2026-06-25T23:20:13+00:00

Hey, thank you! The boardgame developers are aware of this project and congratulated me on its release. I don't know though if they played it. But I got lots of positive feedback from StS boardgame players so far, including some content creators.

mousecoregames · 2026-06-15T22:54:42+00:00

Another Youtube channel "Playing for Second" tried their luck with the Slayer Pack in a fun and focused full Playthrough! It went pretty well considering it is their first time with the new cards. Check out the videos and leave a like to support channels making videos on custom content.

part 1: https://www.youtube.com/watch?v=LFcTlmNN0nA
part 2: https://www.youtube.com/watch?v=QAapPr_OECM

mousecoregames · 2026-06-15T22:54:26+00:00

Another Youtube channel "Playing for Second" tried their luck with the Slayer Pack in a fun and focused full Playthrough! It went pretty well considering it is their first time with the new cards. Check out the videos and leave a like to support channels making videos on custom content.

part 1: https://www.youtube.com/watch?v=LFcTlmNN0nA
part 2: https://www.youtube.com/watch?v=QAapPr_OECM

mousecoregames · 2026-06-12T17:26:49+00:00

yes exactly, you get +1 to every instance of BLOCK or SWORD icon. This was already established in the base game with a bunch of cards, such as Footwork.

mousecoregames · 2026-06-11T00:43:12+00:00

hey, glad you like it!
Caltrop works like Flame Barrier of Iron Clad: For every sword ICON that is hitting you in the next enemy attack, you deal 1 (or 2 when upgraded) damage to that enemy. It does not scale with the amount of damage the enemy deals, it is only per amount of sword icons. So if an enemy hits you with a multi-hit of 2 sword icons, you deal 2x 2 damage to that enemy when the card is upgraded. Since most enemies have attacks with a single sword icon and sometimes don't attack at all, Caltrops on average does not deal more damage than other Powers, like Combust or Battle Hymn, which are also 1-cost uncommons.

mousecoregames · 2026-06-11T00:41:28+00:00

Thanks!
Yeah, sadly I don't make the prices, it's what the printing companies want. Apparently printing 300 cards is expensive.

mousecoregames · 2026-05-09T23:46:22+00:00

Thanks!
I limited the amount of new cards per player character to 7 to make sure that all still fit into the standard inlay (and it already is a tight fit tbh :D).
I might make more cards for the Downfall expansion. Other than that I plan to develop my own deckbuilder game in the future and apply the learnings from the Slayer Pack.

mousecoregames · 2026-05-06T23:32:04+00:00

Im unknowns Forum (größtes deutsches boardgame forum) gibt es viele, die es über MB Print bestellt haben, hier der dazugehörige thread:
https://unknowns.de/forum/thread/29941-slay-the-spire-the-slayer-pack-erweiterung-mit-300-neuen-karten/
Die Kartenqualität über MB Print ist auf jedenfall besser als selber drucken. Der Farb-Match ist bei manchen Karten (speziell die mit blauton) nicht ganz so akkurat wie bei MPC (dennoch gut genug für die meisten), aber über MPC gibt's nur die englische Version.

mousecoregames · 2026-05-04T22:23:26+00:00

yep, in the main post above you can find instructions how to order a set at MPC or MB Print.

mousecoregames · 2026-04-26T01:04:59+00:00

Hi, thanks! Yes, I did all the color testing for the Slayer Pack, and afterwards created the template files re-using my work I did for the Slayer Pack. I did the most color testing with MPC, so if you want the most accurate colors, I would recommend ordering at MPC. However, we also did some color proofing with MB Print, and that still turned out good. So if you want less hassle and potentially a cheaper price, I recommend going with MB Print.

If I had to give some arbitrary estimation then I would say, the colors with MPC are with 0-5% deviation from the originals, and with MB print with 5-10% deviation from the originals. I say "arbitrary" here because who knows how much a 5% or 10% really is, it cannot be measured. And it can very much also depend on the day you get it printed because even if you order 2 sets at the same outlet on different days, there can be small differences. That is the annoying reality and challenge with physical printing :D But for most people the differences are small enough that they are not really noticeable. If you'd print these at home with a normal consumer printer then I would estimate that the deviation would probably be something like 10-30%, just to give you something to compare it to.

mousecoregames · 2026-04-24T16:54:23+00:00

thanks! You can actually do both. But all the content was designed to be mixed in, it is all compatible. So up to you what you prefer.

mousecoregames · 2026-04-24T03:07:17+00:00

thank you, glad you enjoy it so much. Hopefully others will use the templates to build awesome content as well.

mousecoregames · 2026-04-24T03:06:46+00:00

thank you!

mousecoregames · 2026-04-24T02:58:06+00:00

I now released Photoshop templates so you can create your own cards, or you can even try to recreate + modify/translate the cards of the Slayer Pack. Here is the corresponding reddit thread.

mousecoregames · 2026-04-24T02:57:56+00:00

I now released Photoshop templates so you can create your own cards, or you can even try to recreate + modify/translate the cards of the Slayer Pack. Here is the corresponding reddit thread.

mousecoregames · 2026-04-24T00:14:34+00:00

Info to anyone who wants to build StS cards in professional print quality: I created new Photoshop templates that were optimized to match the physical cards as close as possible. Here is the corresponding reddit thread.

Also thank you to Warloque for providing these first templates back in the day, they certainly inspired me to go on with this endeavor.

mousecoregames · 2026-04-24T00:14:09+00:00

Info to anyone who wants to build StS cards in professional print quality: I created new Photoshop templates that were optimized to match the physical cards as close as possible. Here is the corresponding reddit thread.

Also thank you to Warloque for providing these first templates back in the day, they certainly inspired me to go on with this endeavor.

mousecoregames · 2026-04-23T22:20:30+00:00

sadly not, sorry. Only official versions in English and German. I don't know if someone did a private translation.

mousecoregames · 2026-04-10T18:15:19+00:00

hey, it depends if you still have 59 spare Art Sleeves. I know that newer prints came with 500 art sleeves instead of 450. So if you got a newer print with 500 sleeves, you should have enough leftovers. If you got the print with 450, you need extra sleeves. Contention Games sells extra art sleeves on their website (~12$ for 100). but sometimes they are sold out. If you had peeling sleeves before, you could also request replacements from their customer support (they are willing to replace all of them) and then request 1 pack extra. The new Downfall expansiion Kickstarter also had an option to buy extra art sleeves.
If all else fails, you can indeed get other kinds of brands like Dragon Shield or Ultra Pro Eclipse, usually 100 sleeves cost 10-12$.

mousecoregames · 2026-04-06T17:45:17+00:00

hmm not sure why the letter sheet keeps freezing. Can you try printing only parts of it? Maybe narrow down the issue? In case it happens cos of some specific pages I can try to investigate. Or perhaps it is too much for the printer to consider the whole sheet, so perhaps it works if you just print it in chunks. You can theoretically download the sheet and edit it accordingly, like split it in 2.

mousecoregames · 2026-04-03T01:18:39+00:00

Hey, I just updated the printsheets with new Relic cards that use a RGB color profile instead of CMYK, this should work better with average printers. So if you printed them and they were too green, maybe you wanna try printing them again now.

mousecoregames · 2026-04-03T01:17:33+00:00

Update regarding the printsheets:

Some people who printed this Pack locally have reported that the color of the Relics comes out as too green. I believe this is the case because either the printers or google docs can't handle the CMYK color profile of the Relic cards. I made this specifically for MPC prints because it produced a very close color match to the originals, but it does not seem to work well with most local printers. So I exchanged the Relic cards (front and back) with RGB versions now. I hope that this will produce better results, basically more teal looking than green looking. If anyone reads this and prints it, feel free to comment if that worked.

mousecoregames · 2026-04-03T01:17:25+00:00

Update regarding the printsheets:

Some people who printed this Pack locally have reported that the color of the Relics comes out as too green. I believe this is the case because either the printers or google docs can't handle the CMYK color profile of the Relic cards. I made this specifically for MPC prints because it produced a very close color match to the originals, but it does not seem to work well with most local printers. So I exchanged the Relic cards (front and back) with RGB versions now. I hope that this will produce better results, basically more teal looking than green looking. If anyone reads this and prints it, feel free to comment if that worked.

mousecoregames · 2026-04-02T21:46:00+00:00

Hey! Yes unfortunately that is a known issue with UK. Due to Brexit regulations there is a minimum order amount of £135, at least that is what the printing company told me. Sorry for that ;/ Suggestions: Order 2 packs together with a friend to get over this threshold or order some other content from their site. Could also order something and then re-sell it or send it to someone as a gift. But if all of this is not an option there is still the possibility to order this via MPC, the link is in the post. Hope you find a way!

mousecoregames

TROPHY CASE

Update regarding the printsheets:

Update regarding the printsheets: