You control up to seven lands that can tap to produce at least ({5} magic symbol) ({W} magic symbol) ({W} magic symbol) ({W} magic symbol) .
Steps
Activate up to seven mana-producing lands by tapping them, adding at least ({5} magic symbol) ({W} magic symbol) ({W} magic symbol) ({W} magic symbol) .
Activate Livio's first ability twice by paying ({2} magic symbol) ({W} magic symbol) ({W} magic symbol) , exiling Great Whale and Hyrax Tower Scout with aegis counters on them.
Activate Livio's second ability by paying ({2} magic symbol) ({W} magic symbol) and tapping it, returning Great Whale and Hyrax Tower Scout from exile to the battlefield.
Hyrax Tower Scout and Great Whale enter the battlefield, triggering their abilities.
Resolve the Great Whale trigger, untapping up to seven lands you control.
Resolve the Hyrax Tower Scout trigger, untapping Livio.