Satoru Umezawa and Silver-Fur Master on the battlefield.
You control another nontoken creature that can attack this turn, and that cannot be blocked by an opponent.
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) .
Steps
Declare another nontoken creature as an attacker.
When the creature isn't blocked by an opponent, activate up to seven lands you control by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Activate Palinchron's ninjitsu ability by paying ({1} magic symbol) ({U} magic symbol) ({B} magic symbol) and returning the unblocked creature to your hand, putting Palinchron onto the battlefield tapped and attacking.
Palinchron enters the battlefield, untapping the seven lands.
Activate any creature card in your hand's ninjitsu ability by paying ({1} magic symbol) ({U} magic symbol) ({B} magic symbol) and returning Palinchron to your hand, putting the creature onto the battlefield tapped and attacking.
Activate up to seven lands you control by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .