This is awesome! I love all the interest and discussion so far, I've gotten a lot of ideas to refine through testing. I agree, I think Karakas is now worth it because it can deal with Teeg, Thalia and Clique (sort of). This deck has a goal of hitting pretty much exactly five lands, so I don't want to play more, but I think having Seat of the Synod is actually necessary (I've tutored for it with E tutor and won games with it there, and been frustrated when I couldn't tutor for a land).

Here's my current list:

// Lands
8 [UNH] Island
2 [B] Tundra
4 [ON] Flooded Strand
1 [ZEN] Marsh Flats
2 [ON] Polluted Delta
1 [ZEN] Misty Rainforest
1 [ZEN] Scalding Tarn
1 [UNH] Plains
1 [MR] Seat of the Synod
1 [LG] Karakas

// Spells
2 [AL] Helm of Obedience
2 [US] Energy Field
3 [ZEN] Spell Pierce
3 [RTR] Rest in Peace
2 [RTR] Detention Sphere
4 [ARE] Enlightened Tutor
4 [COM] Brainstorm
4 [CS] Counterbalance
4 [CHK] Sensei's Divining Top
4 [AL] Force of Will
1 [US] Back to Basics
1 [PLC] Porphyry Nodes
3 [CST] Swords to Plowshares
1 [RTR] Pithing Needle

// Sideboard
SB: 1 [US] Energy Field
SB: 1 [RTR] Rest in Peace
SB: 2 [RTR] Detention Sphere
SB: 1 [PLC] Porphyry Nodes
SB: 1 [CST] Swords to Plowshares
SB: 3 [WWK] Jace, the Mind Sculptor
SB: 1 [TE] Humility
SB: 2 [COM] Flusterstorm
SB: 1 [MI] Cursed Totem
SB: 1 [US] Arcane Laboratory
SB: 1 [ZEN] Luminarch Ascension


Another idea I had was to simply SB into Miracles! So same MD with the sb of:

// Sideboard
SB: 1 [CST] Swords to Plowshares
SB: 3 [WWK] Jace, the Mind Sculptor
SB: 3 [MOR] Vendilion Clique
SB: 4 [AVR] Terminus
SB: 1 [FNM] Counterspell
SB: 1 [LG] Moat
SB: 2 [AVR] Entreat the Angels


It's surprisingly portable, as the combo is very compact and doesn't require too many pieces of it due to E-tutor.