You can remove from play "Blackwing - Vayu the Emblem of Honor" and "Blackwing Armor Master" from the Graveyard to Special Summon this card and bypass its Synchro Summoning requirements. However, be aware that since "Silverwind" was not initially Synchro Summoned, so you cannot Special Summon this card from the Graveyard and since it was summoned by Vayu's effect, its effects are negated.
The "Blackwing" Synchro Monsters do not specify the Type or Attribute of the non-Tuner monsters. Accordingly, you can use "Quillbolt Hedgehog" to ease "Silverwind"'s Summon. "Hedgehog"'s condition would become active once you control a "Blackwing - Blizzard the Far North" or a "Blackwing - Gale the Whirlwind". This would already give you 5 Levels in the case of "Gale", and 4 in the case of "Blizzard", allowing you to complete the Synchro Summon with "Blackwing - Bora the Spear" or "Blackwing - Kalut the Moon Shadow", respectively.
You can summon a "Blackwing - Kalut the Moon Shadow" to the field and if your opponent attacks it discard the "Blackwing - Kalut the Moon Shadow" from your hand to the graveyard to protect it, so on your next turn you can summon "Blackwing - Blizzard the Far North" to Special Summon back the "Blackwing - Kalut the Moon Shadow" you discarded and Synchro Summon this monster.
Another way to Synchro Summon this card is to Normal Summon "Blackwing - Blizzard the Far North" and use it's Effect to Special Summon "Blackwing - Shura the Blue Flame" and next turn Normal Summon "Blackwing - Fane the Steel Chain" and then Synchro Summon "Blackwing - Silverwind the Ascendant".
This card's first effect is excellent against cards that can't be destroyed in battle or otherwise have a negative effect towards it. It's also an excellent anti-synchro card since most strong synchro monsters have low DEF.
For an extremely quick summon try using "Blackwing - Sirocco the Dawn" in combo with a Level 3 tuner monster and "Level Eater". This won't hamper you as much as other combos and will net you one of the best "Blackwing" Synchro Monsters.
Use this card in combination with De-Synchro to destroy up to 4 monsters with lower DEF the this card's ATK in exchange for skipping 1 battle phase.