Savage Ventmaw and Sword of Light and Shadow on the battlefield.
Savage Ventmaw does not have summoning sickness.
Sword of Light and Shadow attached to Savage Ventmaw.
An opponent is unable to block and kill Savage Ventmaw.
Steps
Declare Savage Ventmaw as an attacker.
Savage Ventmaw triggers, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) that you don't lose as steps and phases end.
Deal combat damage to an opponent with Savage Ventmaw.
Sword of Light and Shadow triggers, causing you to gain three life and return Dryad Arbor from your graveyard to your hand if it's in your graveyard.
Move to your postcombat main phase.
Cast Waves of Aggression from your graveyard for its retrace cost by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) and discarding Dryad Arbor, untapping all creatures that attacked this turn and causing you to get an additional combat and main phase after this one.