1:
Phyrexian Unlife
is the go-to defense card, since it is hard to remove and easy to combo with.
Gideon of the Trials
is probably stronger than unlife, but is much easier to remove, so we only run 3. Finally,
Angel's Grace
lets us combo easily into the jace/spoils win, and it can also gain us a heck ton of life. Here’s how it works: you have phyrexian unlife or gideon on the field, and since you can lose or pay life in this deck without taking damage, you will be at a negative life total. During your opponent’s combat step, if they try to attack you to either kill gideon or give you poison counters, you cast angel’s grace. When you take damage, your life total becomes one, no matter how low your life total was before.
2:
Inquisition of Kozilek
and
Thoughtseize
are played as defensive cards here, meant more to protect your deck’s functioning than ruin the opponent’s.
3:
Fatal Push
and
Path to Exile
protect your life total when you don’t have a defensive card on the field, or when they are outracing you with a big creature on the field.
Supreme Verdict
helps when they try to go wide.
Kaya's Guile
is a good situational card, keeping your life total up in matchups where you need it while also providing some hate and defense.
4:
Serum Visions
helps to dig for the wincons, and
Dark Confidant
keeps our life total low for death’s shadow.
5:
Spoils of the Vault
,
Jace, Wielder of Mysteries
, and
Death's Shadow
comprise this deck’s core. Spoils can find an important card even if you aren’t ready to combo off yet, but it also sets up both of the main wincons.