Rally the Galadhrim | Great Whale

Cards

You control up to seven lands that can tap to produce at least ({2} magic symbol) ({G} magic symbol) ({U} magic symbol) .

Activate up to seven lands by tapping them, adding at least ({2} magic symbol) ({G} magic symbol) ({U} magic symbol) .
Cast
Rally the Galadhrim by paying ({2} magic symbol) ({G} magic symbol) ({U} magic symbol) and tapping
Eternal Witness and
Great Whale, targeting
Eternal Witness.
Rally the Galadhrim's conspire ability triggers, copying it, targeting
Great Whale.
Resolve the copy of
Rally the Galadhrim, creating a token copy of
Great Whale.
When the
Great Whale token enters the battlefield, it triggers, untapping up to seven lands.
Resolve the original
Rally the Galadhrim, creating a token copy of
Eternal Witness.
When the
Eternal Witness token enters the battlefield, it triggers, returning
Rally the Galadhrim from your graveyard to your hand.
Repeat, tapping the
Eternal Witness and
Great Whale tokens when casting
Rally the Galadhrim instead.

This combo has been estimated to be Exhibition (Bracket 1+).