Surly Badgersaur and Land's Edge on the battlefield.
You have at least two additional land cards in hand.
({R} magic symbol) available.
Steps
Activate Forgotten Cave's cycling ability by paying ({R} magic symbol) and discarding it.
Surly Badgersaur's second ability triggers, creating a Treasure artifact token.
Resolve the Forgotten Cave ability, causing you to mill three cards and return Life from the Loam from your graveyard to your hand.
Activate Land's Edge by discarding a land card.
Surly Badgersaur's second ability triggers, creating a Treasure artifact token.
Resolve the Land's Edge ability, dealing 2 damage to an opponent.
Repeat from step 4 one additional time.
Activate the three Treasure tokens by tapping and sacrificing them, adding ({1} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Cast Life from the Loam by paying ({1} magic symbol) ({G} magic symbol) , returning Forgotten Cave and two other lands from your graveyard to your hand.