Taking this to GP Sydney, 13-15/4/18, will let you know how it goes. Suggestions welcome.
Offers lots of synergies. Very flexible, gets a rapid value engine to rapidly drop hordes of creatures from turn 4 onwards. Many lines of attack and no reliance on a single strategy to sideboard against. I find it very fun.
synergies:
Graveyard return for value. Looping land destruction or looping Collected Company or looping path to exiles or looping fetchlands.
Collected Company and aether vial for value. 25 x 3 mana creature drops. Plenty of toolbox. Tick Vial to three and sit- no hard choices here.
Plenty of flash and instant plays. Regularly play land and pass type control, wait for opponent errors and exploit.
Ghost Quarter and Tectonic edge don't just land kill at instant speed. They also provide colourless mana for Displacer and trigger revolt for rallier. Use to stop Tron and to keep foe below 5 mana for qwellers to stay excellent.
In a pinch you can tap a land for mana, ghost quarter it to fetch, play a rallier, and return either the target land or ghost quarter to play (or another already used fetch). This deck thins, mana smooths, and leaves spare cards in graveyard as future witness/rallier targets.
Be aware of fetch, rallier, return fetch to play, fetch again type ramping plays and tectonic edge, rallier, tectonic edge type land kill plays. Learn common deck mana bases and have a general plan of what colours to best try to deny them.
Denial with eidolon of rhetoric plus spell qwellers - if Qweller ever dies/flickers due to/after they've cast a spell that turn then their previous exiled spell is wasted with eidolon in play. Note that they have little ability to stop a Qweller countering their only spell of the turn.
Qweller + Displacer - endless flickered counterspells for 3 mana vs cmc 4 or less. With Eidolon the released spell is negated. Brutal soft lock. Use tectonic edge and mangara to keep them below 5 mana.
Eidolon of rhetoric + aether vial/collected company - they cast one spell per turn, you play multiple creatures/turn. Rapidly overwhelm even a ten mana Tron. Not that you let them stay on Tron for long.
Kira + Eidolon - total immunity to spot removal forever.
Use vials to get around potential counterspells until you have a good eidolon/Qweller combo ready then go through the counterspells.
Mangara + Displacer = Exile one permanent every turn for three mana. Problem solver and land killer. Mangara is best played from a Vial/Collected Company in their end step to be active immediately in your turn.
The opponent's best sideboard is probably anti graveyard, and blood moons. You already have plenty of main board answers to these. These are usually artifacts or enchantments, main deck offers mangara and Qweller against this, sideboard has pridemages.
Opponent using Artifact hate against vials and enchantment hate against eidolon both don't do heaps, especially if you can just return from graveyard. You win the longer game, these type cards don't really help them blitz you.
Against blitz/burn decks you can bring in worship, Finks, wall of denial, settle the wreckage, one more eidolon as you like.
Against vulnerable land bases, storm, combo, and tron bring in the arbiters and last eidolon.
Against artifacts and Enchantments bring in the pridemages.
Enjoy.
