Dragonback Assault | Ganax, Astral Hunter | Encroaching Dragonstorm (and one other card)

Cards

Encroaching Dragonstorm in hand.
All other permanents on the battlefield (
Stone-Seeder Hierophant without summoning sickness).

Cast
Encroaching Dragonstorm by paying ({3} magic symbol) ({G} magic symbol) .
When
Encroaching Dragonstorm enters, it first ability triggers, causing you to search your library for two basic land cards and put them onto the battlefield tapped.
When the lands enter the battlefield,
Stone-Seeder Hierophant and
Dragonback Assault trigger twice.
In response, activate
Stone-Seeder Hierophant by tapping it, untapping a land.
Activate that land by tapping it, adding ({G} magic symbol) .
Resolve a
Stone-Seeder Hierophant trigger, untapping it.
Repeat steps 4 through 6 one additional time.
Resolve a
Dragonback Assault trigger, creating a 4/4 Dragon creature token.
When the Dragon enters the battlefield,
Ganax and
Encroaching Dragonstorm's second ability trigger.
Resolve the
Ganax trigger, creating a Treasure token.
Resolve the
Encroaching Dragonstorm trigger, returning it from the battlefield to your hand.
Resolve the remaining
Dragonback Assault trigger, creating a 4/4 Dragon creature token.
When the Dragon enters the battlefield,
Ganax triggers, creating a Treasure token.
Activate two Treasures by tapping and sacrificing them, adding ({2} magic symbol) .
Repeat.

This combo has been estimated to be Exhibition (Bracket 1+).