Subject: Fields Up! Invulnerability Strategy By Ertai the Arrogant

The concept behind this strategy is both simple and exceptionally powerful.

There are two main components in order to achieve
relative invulnerability.

First off, we have Energy Field from Urza's Saga:

1U Enchantment

Prevent all damage dealt to you by sources you do not
control.

Whenever a card is put into your graveyard, sacrifice
energy field.

Amazing card, if it were not for that huge drawback,
right? The question of which brings us to the other
card in this devious duo:

Yawgmoth's Agenda from Invasion.

3BB Enchantment

Play no more than one spell per turn.

You may play your graveyard as though it were part of
your hand.

Whenever a card would go into your graveyard from
anywhere, remove it from the game instead.

The synergy between the two is quite obvious. A
classic case of manipulating what normally would be a disadvantage to conversely 
provide a benefit, the Agenda "stabilizes" the E. Field with it's third ability, 
as no cards actually ever hit the graveyard, but are instead removed from the 
game. Additionally you also have the contents of your graveyard ready to replay. 
In addition to Arcane Lab, which nullifies the Agenda's one spell per turn 
drawback, and null brooch/ertai/stronghold machinist/etc... and generally a host 
of good counter back up, you effectively have absolute invulnerability AND lockdown. 
I incorporated this combo into a t1 deck that has done very well at many tourneys. 
Any comments or questions are welcome. 

 
-Ertai the Arrogant Orangefinger9999@yahoo.com