How about:(most of the funny ones are quotes from other peoples, so I didn't make them up )
Death house serious: Death is the price everyone pays one day funny: "Welcome to the Amigone Funeral Home!" :D (I saw this on AFV XD)
Life house serious: Cherish life, for it is fleeting funny: (quote from the one and only Jayfeather) "I'm here to heal you. If you want sympathy, go to the nursery!" :x (XD)
Myth house serious: What do we humans become when we lose our imagination? Let's not find out. funny: "Remember: stealing from Cyrus is OK!" (XD)
Storm house serious: Let the power of Storm put a blade in your fist and courage in your soul funny: WARNING: HIGH VOLTAGE! (there's a hazardous sign under it XD) or: DON'T FEED THE SHARKS! (still a hazardous sign XD)
Fire house serious: You will have the warmth of fire to cherish your friends and family and the fierceness of fire to defend them (that one's awesome ) funny: Fire is cool 8)
Ice house serious: The chill of Ice will purge your heart and soul of your fears (something like that XD) funny: Warning! This house is prone to flying snowballs!
If none of these work, then how about a sign saying: KUNG FU STARING CONTEST! with a pair of big eyes staring at you above the door to the house. XD Hope you like them! :D
serious: Balance is the uniting force in the universe. (Couldn't think of anything better. i'll edit if i do) funny: WARNING! You'll get sand in places you don't want them to if you come here XD
And I have no idea where you got these from: (O: Are you a warriors cats fan from your name?)
Here's mine (bet no one can guess where i got them from) one for every school
By the corpse of my pact, may my Master's perils wither - Death By my frozen pact, my Master's Perils shall shatter - Ice These are the flame of my pledge, Burn the karma of my Master - Fire We're the pledged thunderclap. No disaster will hit our Master - Storm The vow of my song, light the path of my Master - Life
Yeeeeeeaaaaaaaa, I cant think of anything for Balance and Myth. Well i tried at least Anywho, these would be given out with the next school pets. When i think of something for the other two schools ill post it.
Ps.. Notice for the storm saying, i said we *hint hint*