Activate Scroll of Fate by tapping it, manifesting Wormfang Manta from your hand.
Pay ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) to turn Wormfang Manta face up.
Activate Linessa by paying ({7} magic symbol) ({U} magic symbol) ({U} magic symbol) and tapping it, returning Wormfang Manta from the battlefield to your hand.
Wormfang Manta's LTB ability triggers, creating an extra turn after this one.