Cast Shimmering Wings by paying ({U} magic symbol) .
Displacer Kitten triggers, blinking Overlord of the Hauntwoods.
When Overlord of the Hauntwoods enters the battlefield, it triggers twice, creating two tapped Everywhere land tokens, which enter untapped due to Spelunking.
Resolve the Shimmering Wings spell.
Activate the two Everywhere tokens by tapping them, adding ({U} magic symbol) ({U} magic symbol) .
Activate Shimmering Wings by paying ({U} magic symbol) , returning it from the battlefield to your hand.