Activate Soul of Windgrace's second ability by paying {R} and discarding Dakmor Salvage.
Surly Badgersaur's second ability triggers, creating a Treasure token.
Resolve the Soul of Windgrace ability, causing you to mill two cards and return Dakmor Salvage from your graveyard to your hand.
Activate a Treasure token by tapping and sacrificing it, adding {R}.
Repeat.

Infinite self-discard triggers

Infinite self-mill

Soul of Windgrace

Surly Badgersaur

Dakmor Salvage

Heartstone

Agatha of the Vile Cauldron

Zirda, the Dawnwaker

Training Grounds

Biomancer's Familiar

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