Satoru Umezawa | Peregrine Drake | Silver-Fur Master

Cards

Silver-Fur Master does not have summoning sickness and cannot be blocked by an opponent.
You control up to five lands that can tap to produce at least ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .

Declare
Silver-Fur Master as an attacker.
When it isn't blocked, activate up to five lands you control by tapping them, adding at least ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Activate
Peregrine Drake's ninjutsu ability by paying ({1} magic symbol) ({U} magic symbol) ({B} magic symbol) and returning
Silver-Fur Master from the battlefield to your hand, putting
Peregrine Drake onto the battlefield from your hand tapped and attacking.
When
Peregrine Drake enters the battlefield, it triggers, untapping up to five lands.
Activate
Silver-Fur Master's ninjutsu ability by paying ({U} magic symbol) ({B} magic symbol) and returning
Peregrine Drake from the battlefield to your hand, putting
Silver-Fur Master onto the battlefield from your hand tapped and attacking.
Repeat from step 2.
If you control up to five lands that can tap to produce at least ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) , this combo nets infinite mana.