Fertilid by paying ({1} magic symbol) ({G} magic symbol) and removing a +1/+1 counter from it, searching your library for a basic land card and putting it onto the battlefield tapped.
When the land enters the battlefield,
Bristly Bill,
Nissa and
Tireless Provisioner trigger.
Resolve the
Bristly Bill trigger, putting a +1/+1 counter on
Fertilid.
Resolve the
Nissa and
Tireless Provisioner triggers, adding ({G} magic symbol) and creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding ({1} magic symbol) .
Repeat.
Results
Put all basic lands from your library onto the battlefield tapped.