If you won the Invitational...

[Ephraim]

If you won the Magic Invitational, what card would you submit? If I could persuade them to allow me to invite some additional notable persons to have their faces on the card, I would offer Zherbus, at least, an opportunity to appear on this card with me:

Cobalt Order
{U}
Creature -- Wizard
1/2
You may choose not to untap Cobalt Order during your untap step.
: Target creature loses all protection abilities as long as Cobalt Order remains tapped. This ability may target creatures with protection abilities as though they didn't have protection abilities.

If they refused my request and I were only allowed my image and no others, then I would submit this card:

Liege of Elysium
{W}{W}{W}
Legendary Creature -- Angel Lord
3/3
Flying
Remove a card in your hand from the game: Return Liege of Elysium from your graveyard to your hand.
{W}{W}, : You may play a card removed from the game with a card named Liege of Elysium without paying its mana cost.

[Matt]

Well of course the card I most want is:

Many-Tentacled Thing
{B}
Creature -- Horror
0/5
: Tap target creature. That creature deals damage equal to its power to Many-Tentacled Thing. Many-Tentacled Thing deals damage equal to its power to that creature.

But it won't work because the invitational card is supposed to be "me" (Rootwater Thief notwithstanding). So instead I'll choose

Astrologer

Creature -- Wizard
2/1
: Look at the top card of your library.
: Remove the top card of your library from the game.

But I hear there's a VERY similar card coming out in Ravnica. So I guess I could go with

Last Onean

Legendary Creature -- Knight
2/2
If Last Onean would be destroyed, remove all damage from it instead if you control another creature.

[Marco]

One of my favourite (and most controversial) cards I've ever created would be my pick. (I'll be posting this eventually as it is not on the Master List, and it may never be, but I hope we will just post cards here and not necessarily critique them):

Plundering Horde

Creature -- Nomad
5/5
When Plundering Horde comes into play, remove all cards in your hand from the game.
You may remove three Mountain cards in your library from the game rather than pay Plundering Horde's mana cost. If you do, shuffle your library.

My other pick, which would need a human in the art as it is a Goblin, would be:

Goblin Saboteur

Creature -- Goblin
2/1
When Goblin Saboteur comes into play, destroy target artifact with converted mana cost 3 or less. If the artifact would be put into a graveyard this turn, remove it from the game instead.