Zinnia, Valley's Voice | Temur Sabertooth | Great Whale

Cards

Great Whale in hand.
Zinnia and
Temur Sabertooth on the battlefield.
You control up to seven lands that can tap to produce at least ({4} magic symbol) ({G} magic symbol) ({U} magic symbol) .
({2} magic symbol) ({U} magic symbol) at most available.

Activate up to seven lands by tapping them, adding at least ({4} magic symbol) ({G} magic symbol) ({U} magic symbol) .
Cast
Great Whale by paying ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) plus an additional ({2} magic symbol) for its offspring cost.
When
Great Whale enters the battlefield, it triggers twice.
Resolve the first
Great Whale trigger, untapping up to seven lands.
Holding priority, activate up to seven lands by tapping them, adding at least ({4} magic symbol) ({G} magic symbol) ({U} magic symbol) .
Resolve the second
Great Whale trigger, creating a token copy of it that is 1/1.
When the
Great Whale token enters the battlefield, it triggers, untapping up to seven lands.
Activate
Temur Sabertooth by paying ({1} magic symbol) ({G} magic symbol) , returning the nontoken
Great Whale from the battlefield to your hand.
Repeat.