Satoru Umezawa | Yuriko, the Tiger's Shadow | Palinchron

Cards

Yuriko does not have summoning sickness and cannot be blocked by an opponent.
You control up to seven lands that can tap to produce at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .

Declare
Yuriko as an attacker.
When it isn't blocked, activate up to seven lands you control by tapping them, adding at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Activate
Palinchron's ninjutsu ability by paying ({2} magic symbol) ({U} magic symbol) ({B} magic symbol) and returning
Yuriko from the battlefield to your hand, putting
Palinchron onto the battlefield from your hand tapped and attacking.
When
Palinchron enters the battlefield, it triggers, untapping up to seven lands.
Activate
Yuriko's ninjutsu ability by paying ({U} magic symbol) ({B} magic symbol) and returning
Palinchron from the battlefield to your hand, putting
Yuriko onto the battlefield from your hand tapped and attacking.
Repeat from step 2.
If you control up to seven lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) , this combo nets infinite mana.