Murasa Rootgrazer + Retreat to Coralhelm + Clever Impersonator Combo

All permanents on the battlefield.

At least one basic land in hand. Clever Impersonator is a copy of Retreat to Coralhelm. Murasa Rootgrazer does not have summoning sickness.

Activate Murasa Rootgrazer's first ability, putting a basic land from your hand onto the battlefield.

The Retreat to Coralhelms trigger.

In response, activate the basic land by tapping it, adding .

Let the first Retreat to Coralhelm trigger resolve, untapping Murasa Rootgrazer.

Activate Murasa Rootgrazer's last ability, returning any basic land you control from the battlefield to your hand.

Let the second Retreat trigger resolve, untapping Murasa Rootgrazer.

Repeat.

Infinite landfall triggers

Infinite mana basic lands you control can produce