Omnath 3: Omnath and the Mysteries of the Roil (EDH / Commander)

This is a combo/midrange deck based on Omnath, Locus of the Roil's second ability (Landfall - draw a card if you control 8 or more lands), so the deck heavily focus on ramping.

I've added some non-budget upgrades for the deck to the sideboard. (Obviously fetchlands would also make the deck better)

Our most important combo piece is Retreat to Coralhelm/Tideforce Elemental and their Landfall trigger to untap a creature. Through the use of Llanowar Scout, Budoka Gardener or Walking Atlas we can put as many lands to the battlefield as we have in hand. The final piece of the combo is either Meloku, the Clouded Mirror, Oboro Breezecaller or any two of the three bouncelands (Simic Growth Chamber, Gruul Turf, Izzet Boilerworks); resulting in infinite Landfall triggers and potentially either infinite mana or infinite illusions.

Alternatively, Abundance and an online Omnath / Tatyova will let us play all the lands in the deck in a single turn.

Special Notes:
Ashling's Prerogative should almost always be set on EVEN.
Sunscorched Desert acts as a wincon once we've achieved the aforementioned bounce/put land combo.
The Mending of Dominaria is slow but should generates a lot of value, specially if Omnath is out at the last chapter.
Uncage the Menagerie, Signal the Clans, Traverse the Ulvenwald and Shared Summons are our tutors.
Treacherous Terrain is a sneaky finisher.