Special Summon this card using "Blackwing - Shura the Blue Flame". It's first effect will be negated, and so can be used to Synchro Summon one monster. Then, whilst in the Graveyard, the monsters can be used again to Special Summon again. This goes very well with "Burial from a Different Dimension", which will let yourself use this combo over and over again.
Trick your opponent into attacking a "Vayu" in face-up Attack Position, then activate "Swallow's Nest". This way, another "Vayu" will be Special Summoned from your Deck in face-up Defense Position and send the first one to the Graveyard.
This card works especially well with "Royal Oppression". Use the effect of "Vayu" and attempt to Special Summon one "Blackwing" Synchro Monster. If your opponent negates the effect of "Vayu", no monster will be banished from your Graveyard and the process will simply be redo again.
This trick also works against "Light and Darkness Dragon". Just redo the process until the "Light and Darkness Dragon" has less then 500 DEF.