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 Glass Cannon (challenge #11).
- 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 Poster or the choice between The Polaroid and The Negative after defeating Mom.
|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
- NICA LISY
- PAC1 F1SM
- SLOW 4ME2
- TARO TARJ
- THEG HOST
- XXXX XXZX
- 8AJJ AASE