Sophina, Spearsage Deserter | Havengul Laboratory // Havengul Mystery | Wormfang Manta

(and two other cards)

All permanents on the battlefield.
Sophina and at least two other nontoken creatures you control do not have summoning sickness.
An opponent cannot block and kill creatures you control.
({4} magic symbol) each turn available.

Declare
Sophina and two other nontoken creatures as attackers.
Sophina triggers, creating three Clue artifact tokens.
Activate
Ashnod's Altar by sacrificing
Wormfang Manta, adding ({C} magic symbol) ({C} magic symbol) .
Wormfang Manta leaves the battlefield, causing you to take an extra turn after this one.
If
Wormfang Manta was put onto the battlefield by
Havengul Mystery,
Havengul Mystery triggers, transforming itself.
Activate the Clue tokens by paying ({6} magic symbol) , tapping and sacrificing them, causing you to draw three cards.
At the beginning of your end step,
Havengul Laboratory triggers, transforming itself.
Havengul Mystery triggers, returning
Wormfang Manta from your graveyard to the battlefield.
Repeat each turn.