You have a land card in hand that enters the battlefield untapped.
Steps
Activate
Llanowar Scout by tapping it, putting a land from your hand onto the battlefield.
The land enters the battlefield, triggering
Tireless Provisioner and
Retreat to Coralhelm twice.
Resolve both
Tireless Provisioner triggers, creating two Treasure tokens.
Resolve both
Retreat to Coralhelm triggers, untapping
Llanowar Scout and choosing either to untap another creature or scry 1.
Activate a land by tapping it, adding at least ({1} magic symbol) .
Activate both Treasure tokens by tapping and sacrificing them, adding ({R} magic symbol) ({G} magic symbol) .
Activate
Mina and Denn by paying ({R} magic symbol) ({G} magic symbol) and returning a land from the battlefield to your hand, giving a creature trample until end of turn.