The hype is real.

[Zapperzz99]

a multiple potion effect card (maybe oriented toward combat, mining, easter egg parkour or some specific task)

do any of the last 2 involve a new plugin / feature?
If so I have some guesses such as:
personal assistant / turtle for mining or killing or something (it would be a pet like a wolf I guess)
a card to respawn the dragon or give you ender crystals
a new custom weapon card

[BioZombieActive]

since they share the same theme and its close to relating to XP.....

a dual card: one is passive like the 5% champ shop discount but this one is something to do with XP or.... add potion effect to any weapon?
The other is not passive: It gives the player a bottle of XP head!

its a weather card that rains down exp from above for 15 seconds
Daloria will come and give you some warm milk and cookies while you are in bed???
a card that bottles up your experience levels into bottle of Exp' using empty bottles in your inventory?

[BioZombieActive]

Pri, will some of these guesses be turned into normal/blackmarket cards if they seem like really good ideas?

[wannsa]

Get outta ban free card
no xp needed for mending
use xp to buy shit
use xp to sell shit
use xp for taxes instead
trade xp
give away xp
store xp
take your xp out on a date
take pri out on a date
1 lap dance at the high rollers club delivered by the admin of your choice
I'm really struggling with ideas here lol

[BioZombieActive]

Turns enchanted item in hand into XP via a ratio of how much damage it has?

[blackeyeddog]

Free cake
Free cookies

NOM NOM

[Pri]

Still no correct guesses haha

[BioZombieActive]

How close are we?

[Pri]

Not very close. Also to answer your earlier question, good card ideas will always be considered for future cards even the ones submitted here

[iNook]

Some sort of potion effect card?
Gives everyone online a certain effect?
Drunkness for everyone card?
Shield Card (for 1.9)
TP card