I want to get Jeskai Geist in MTGO (I have the Paper Version) but I can't afford it for the moment, so I'm going to build a UW Tempo Deck that is upgradable to Jeskai Geist in increments.
The key cards of this version are:
4x Delver of Secrets
: Very efficient 3/2 flyer in the most cases so we have so many instant and sorcery spells to flip it consistently.
4x Reflector Mage: Gains up us some tempo, opening a path for Delver in case of any of ours oponents creatures have flying and leaving a 2/3 body on the field to increase the clock.
4x Meddling Mage: Another tempo creature. You need to know your oponents deck or look into his or her hand using Peek to make the best informed desicion, but this card is so good in tempo decks.
2x Restoration Angel: Good body with flash that protects our Reflector Mages and Meddling Mages (triggering them again), seems good.
4x Peek: this cantrip help us with our Meddling Mages and digs in our deck.
4x Serum Visions: Not so much to say about this don't?
4x Path to Exile: Efficient removal for an efficient deck
2x Spell Snare: So powerful counter in modern and gains us a ton of tempo countering a 2cmc spell using only U.
4x Mana Leak and 3x Remand: 2cmc counters to protect our threats.
3x Vapor Snag: Tempo removal with some damage. Not the best but a good budget cards I guess.
2x Logic Knot: Fueled by the cantrips is a good counterspell in the early game. Would be better with fetchlands
The manabase is some budget 20 Lands:
2x Field of Ruin
2x Glacial Fortress
5x Island
4x Nimbus Maze
3x Plains
4x Prairie Stream
When it takes to the sideboard:
2x Sorcerous Spyglass: Looks oponents hand to help Meddling Mage. It stops things like Ugin, the Spirit Dragon or Karn Liberated, maybe even Arcbound Ravagers or Steel Overseers.
3x Negate: Some non-creature counterspells vs Tron, Control, Burn...
2x Echoing Truth: catch-all removal, specialy good vs Storm or Tokens strategies.
3x Tormod's Crypt: vs Dredge, Jund and other graveyard-reliant decks
2x Celestial Purge: vs Death's Shadow, decks with Liliana of the Veil and even Burn
2x Timely Reinforcements: vs Burn and other superaggresive decks
1x Rule of Law: vs Storm.
Now, planning updates in near future
Reflector Mage --> Geist of Saint Traft: This is so straightforward. Our Hexproof favorite spirit is a so huge clock, so dificult to get rid of.
Delver of Secrets
or Meddling Mage --> Spell Queller: This increase the AVG CMC of the deck so this will come with an augment of the land count from 20 to 22
WIP...