Temur Sabertooth and Great Whale on the battlefield.
You control at least one other creature that can attack this turn.
You control up to seven lands that can tap to produce at least ({4} magic symbol) ({G} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Great Whale does not have summoning sickness.
An opponent is unable to block and kill creatures you control.
Steps
Declare Great Whale and any other creature as attackers.
When they are unblocked, activate up to seven lands you control by tapping them, adding at least ({4} magic symbol) ({G} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate Thousand-Faced Shadow's ninjutsu ability by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) and returning the other attacking creature to your hand, putting Thousand-Faced Shadow from your hand onto the battlefield tapped and attacking.
Thousand-Faced Shadow enters the battlefield, creating a token copy of Great Whale.
The token Great Whale enters the battlefield, untapping up to seven lands you control.
Activate Temur Sabertooth by paying ({1} magic symbol) ({G} magic symbol) , returning Thousand-Faced Shadow from the battlefield to your hand.