Palinchron and Biting-Palm Ninja on the battlefield.
Biting-Palm Ninja and Palinchron do not have summoning sickness.
An opponent cannot block Biting-Palm Ninja or Palinchron.
You control up to seven lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) .
Steps
Declare Palinchron and Biting-Palm Ninja as attackers.
When they aren't blocked, activate up to seven lands you control by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) .
Activate Thousand-Faced Shadow's ninjutsu ability by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) and returning Biting-Palm Ninja from the battlefield to your hand, putting Thousand-Faced Shadow onto the battlefield from your hand tapped and attacking.
When Thousand-Faced Shadow enters the battlefield, it triggers, creating a token copy of Palinchron that is tapped and attacking.
When the Palinchron token enters the battlefield, it triggers, untapping up to seven lands.
Activate Biting-Palm Ninja's ninjutsu ability by paying ({2} magic symbol) ({B} magic symbol) and returning Thousand-Faced Shadow from the battlefield to your hand, putting Biting-Palm Ninja onto the battlefield from your hand tapped and attacking.
Repeat from step 2.
Deal combat damage using the Palinchron tokens, dealing infinite combat damage to the defending opponent.
If you control up to seven lands that can tap to produce at least ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) , this combo nets infinite mana.