What do you have as your blank cards?

I have a decoy item card where if nobody is looking you can attempt to swap it with another player's item. If you're caught, loose a level and discard that card. If not it stays and the player can attempt to pass it on or sell it for 100 gold.

I also made a Twister curse where every player's items are shuffled and redistributed evenly between all players.

I have a "Leeeeroyyyy jenkinsss" card that forces the player directly to your left to assist you against a monster, whether they like it or not.

Cheezy goes up a level

Play immediately after drawing. Cheezy goes up a level, and it can be the winning level. No-one else gets anything. Sucks to be them.

I'm not allowed to play with this card any more.

A monster that makes it so that two players battle each other for an item of their choice and each player in the fight is also considered a monster for card text purposes. A lot of situational stuff to be ironed out though.

A barbarian class, can use all weapons that warriors use, gains +1 for each item equipped. Honour - Can't leave a battle, must fight to the death.

I made one and called it Musical Chairs!!! It says "Play this as soon as it comes into your hand. This is not a curse and therefore cannot be Wishing Ringed. Each player puts down their hand and moves one seat to the left and the current player's turn resumes."

Curse: Dying of Thirst - lose a level, target player must drink a sip from every other players' drink. If there are no drinks, lose two levels.

edit - also, if this card is played, everyone may finish their drinks to deny the target player that one level saving sip.

My playing crew have made the following:

Seppuku: at any time you wish, you may play this card, executing yourself (this may be preferable to the Bad Stuff in a losing combat). Follow the normal procedures for player death.

C'thulu: lvl 30 monster; Immediately roll a die: 1-2, C'Thulu slumbers, pass by safely; 3-4, C'Thulu stirs, throw a 2-handed or armor item to distract him and escape; 5, C'Thulu glares at you, driving you made (you now have to help everyone else in combat for 2 rounds); 6, C'Thulu finds you worthy to fight. Bad Stuff: annihilation--die and go back to level 1; 5 treasures, 3 lvls

Wand of Joy: 1 hand, +1 in combat; may be played as one-time use: the player you use it on is so pleased by your wand-work, they agree, in their bliss, to give you any single item they have equipped.

Faux Name: you can tell the monster (under level 7) that your name is that of another player; you fight the monster with THAT player's actual and effective levels; that player can't "help" you by adding themselves on top of your efforts, nor can any other player help; if you lose, YOU suffer the consequences when the monster learns of your deceit; if you win, the "used" player gets 2 treasures. (one-time use)

Still working on shortening the verbage so they might someday fit on the card; as it stands, a picture and name are on the cards, with a reference card we've made with these rules and stipulations.

Do you guys make your own blank cards or is there a place to get them. I love Munchkin and have been playing for about a year now, but I've never seen blank cards.