Fall of the Thran | Evolution Sage | Retreat to Coralhelm

(and two other cards)

At the beginning of your precombat main phase,
Fall of the Thran triggers, putting a lore counter on it.
Fall of the Thran's second or third chapter ability triggers.
Holding priority, activate
Trenching Steed by sacrificing a land, giving it +0/+3 until end of turn.
You may optionally repeat step 3 one additional time.
If
Fall of the Thran has three loyalty counters on it, activate
Xavier Sal's first ability by tapping it and removing a lore counter from
Fall of the Thran, causing you to populate.
Resolve the
Fall of the Thran chapter trigger from step 2, causing each player to return two land cards from your graveyard to the battlefield.
Whenever the land(s) enter the battlefield,
Evolution Sage and
Retreat to Coralhelm trigger for each land that entered the battlefield under your control.
Holding priority, if the land(s) enter the battlefield untapped, you may activate them by tapping them, adding at least ({1} magic symbol) .
Resolve the first
Retreat to Coralhelm trigger, untapping
Xavier Sal.
Resolve the second
Retreat to Coralhelm trigger, if applicable, either causing you to scry 1 or to tap or untap target creature.
Resolve the first
Evolution Sage trigger, putting a lore counter on
Fall of the Thran.
Repeat from step 2.
If applicable, resolve all remaining
Evolution Sage triggers, causing you to proliferate that many times.
If you sacrifice and return two lands each cycle, this combo will net infinite untap of creatures you control and infinite scry 1.

Infinite copies of creature tokens you control.
Infinite creature tokens.
Infinite ETB.
Infinite landfall triggers.
Infinite mana creatures you control can produce.
Infinite mana lands you control that enter the battlefield untapped can produce.
Infinite proliferate.
Infinite scry 1.
Infinite untap of creatures you control.
Return all land cards from all graveyards to the battlefield under their owner's control.