The Rules Card is a special card which randomly displays cryptic statements on the screen similar to a Fortune Teller.
It is unlocked by completing Challenge #11, Glass Cannon.
- Upon activation, displays one of the following messages:
|CHUB DISLIKES SMOKE!
||Referencing the trick in which Isaac can drop a bomb in front of a charging Chub to have her swallow it. Reference to Zelda 1 and 'DODONGO DISLIKES SMOKE'.
|A PIECE OF PAPER IS YOUR GUIDE
||Possibly refers to the Missing PosterIf Isaac dies in a Sacrifice Room, a puzzle piece will appear on his last will (Added in Afterbirth and unlocks The Lost). Added in Afterbirth Revives Isaac as The Lost if unlocked. The Missing Poster then disappears. or Mysterious PaperHas a chance to replicate the effects of A Missing Page, The Polaroid, The Negative, or Missing Poster. trinkets. Could also be referencing itself.
|THE WALLS WILL HARDEN OVER TIME. TIME IS THE ESSENCE
||Presumably referencing the Boss Rush that occurs if Mom is beaten in under 20 minutes.
|A DARK MARKET LIES UNDER YOUR FEET
||Presumably referencing the secret trapdoors occasionally under rocks and the rare trapdoor that leads Isaac to the Black Market, a devil room-like area.
|SOME DOORS REQUIRE A BLESSING. CARRY THEM WITH YOU
||Refers to how to open the large golden door on The Chest and the Dark Room, by gathering two Key Pieces from the Angels.
|DENY HIS GIFTS TO ATTAIN YOUR REWARD
||References how skipping a deal with the Devil gives the chance to gain access to the Angel Room.
|SLEEPING GATEKEEPERS WILL NEED TO BE AWOKEN WITH A LOUD SOUND
||Possibly referencing how the player can use bombs on the angel statues in order to awaken them. Reference to Zelda 1.
|ROOMS MAY YIELD MORE THAN YOU EXPECT. EXPERIMENTATION IS KEY
||Unknown, possibly referencing Secret Rooms or the trapdoor and bed in Isaac's room, or tinted rocks and other breakable objects.
One of the following Seeds may also be displayed:
- BOOB TOOB
- BRWN SNKE
- B911 TCZL
- CAMO K1DD
- CAMO DROP
- CHAM P1ON
- CLST RPHO
- COCK FGHT
- COME BACK
- CONF ETTI
- DONT STOP
- DRAW KCAB
- DYSL EX1A
- FACE DOWN
- FART SNDS
- FREE 2PAY
- IMNO BODY
- GGGG GGGG
- HART BEAT
- ISAA AACE
- KEEP AWAY
- PAC1 F1SM
- SLOW 4ME2
- TARO TARJ
- THEG HOST
- XXXX XXZX
- 8AJJ AASE