Revealed here, Rouxls Kaard (pronounced "Rules Card" and RK for short) is the 3rd Deltarune and overal card shown for Beta 30.0. Previous Versions can be found here. Previous Versions of the Puzzle Box can be found here.
RK has the same passive effect as Frisk, making its owner immune to any DMG. However, unlike Frisk, it doesn't have the (potential) HP they have, but also not the cost.
Instead, when played, RK will add a Puzzle Box to the enemy's hand, making it similar to Pre-Beta 56.0 Annoying Dog when wanting to overflow their hand. This Puzzle Box is a simple 3G spell that, when used, will silence a monster of the user's choice. This makes the spell identical to Penetration, but with triple the cost.
Avoid using Receptionist 3 if you find out that the oponent has this card by using Spy or Eye, since the Puzzle Box will not be added to your hand. This goes double if your enemy has Taunt monsters on the board. On the contrary, you don't have to use the Puzzle Box to silence RK, as it can be easily killable, especially for those using a Justice or Perseverance Deck. It'll allow you to Silence something much more threatening.
- Standing Rouxls Kaard (by Jacky Bunny - Fan Artist)
- Hardest Puzzle (by Jake Horror)
- Whaaat (by CoreSilence)
- According to Plan (by Jake Horror)
- Tasty Puzzle (sold separately)
- Nobody Can Stop Him (by Diamaincrah)
- Tricky Box (sold seperately)
- Starlight (GIF by Jake Horror)
Its Theme is sped-up from the OST, being at the same speed as during your 2nd encounter with RK in Deltarune.