UW Iona Control II

The New Deck:

// Lands
4 Sejiri Refuge
4 Glacial Fortress
11 Plains
4 Island

// Creatures
4 Knight of the White Orchid
2 Sphinx of Jwar Isle
2 Iona, Shield of Emeria

// Spells
4 Path to Exile
4 Flashfreeze
2 Essence Scatter
4 Fieldmist Borderpost
4 Day of Judgment
2 Elspeth, Knight-Errant
3 Kiss of the Amesha
3 Mind Spring
3 Martial Coup

// Sideboard
SB: 4 [Baneslayer Angel
SB: 4 Hindering Light
SB: 4 Relic of Progenitus
SB: 3 Luminarch Ascension

~

The Changes & The Why:

-1 Plains, -4 Island / +4 Sejiri Refuge:
The manabase was occasionally having trouble reaching double white, and 28 land-borderposts was just 1 land-borderpost too many.

The 4 new nonbasics came in under the justification that Jund can already kill your manabase if they want to -- your Borderposts are pulsable (even Duressable!) and your Fortresses are already Ruinblasterable. It's nicer to have a fully functional and slightly more Ruinblasterable manabase than one that was less good, and already vulnerable.

Besides, Flashfreeze already protects from both Ruinblaster and Pulse -- just like SB Hindering Light.

Also, you can easily afford the CIPT.

+2 Sphinx of Jwar Isle
I wanted a wincon that sat below 7cmc. I'm not sold on Sphinxy but he's solid against a bunch of archetypes.

-4 Oblivion Ring / +2 Essence Scatter
This change in removal is a different approach to protecting yourself. The Oblivion Rings tapped you out, were pulsable, and didn't really answer anything that absolutely needed to be answered. Instead the Scatters gave you an answer against Ruinblaster -- is better against Broodmate, Siege-Gang Commander, and Bloodwitch -- and answers Sprouting Thrinax the exact same. The downside is it doesn't handle Ajani Vengeant, which this deck now lacks answers for.

Other options are Into the Roil, but that doesn't really seem to gain you any positive movement -- it just buys you a turn.

-1 Kiss of the Amesha
Kiss is good, but not 4-of good. It's 6cmc so it actually can clog up your hand.

+2 Elspeth, Knight-Errant
Elspeth is a legitimate threat and is a nice inclusion for this deck. It also generates more CA.

SB: -3 Pithing Needle / +3 Luminarch Ascension
Luminarch is better against Needle decks except Planeswalkers.

~

Expected Change in Matchups:

With the loss of Oblivion Rings, Ajani Vengeant decks will be harder to beat, and Million Planeswalker decks will now be a bad matchup. Jund and Vampires will be better with easier/stronger handling of their key threats (Ruinblaster, Broodmate, Bloodwitch). Control/Fog will be easier with Elspeths and Luminarchs.