Alternatively, you can search out "Blackwing - Kalut the Moon Shadow" when you Summon "Shura". This way, you're almost guaranteed a kill if you battle a monster with less than 3200 ATK points and will be able to use the effect of "Shura".
Combine this card with "Ultimate Offering" and you get a "Blackwing" version of a GadgetOTK. As soon as you Normal Summon one "Blackwing" you can get another that has lower ATK than the monster that you just Normal Summoned.
When you control both "Royal Oppression" and this card, Normal Summon "Blackwing - Blizzard the Far North". Activate its Trigger Effect and this card's Trigger Effect at the same time. Per SEGOC, you can assign the effect of "Blizzard" to Chain Link 1 and this card's effect to Chain Link 2, which means "Royal Oppression" cannot respond to it. (You will need a "Blackwing" monster with less than 1300 ATK in your Deck to activate "Black Whirlwind".)
If you have a Field Spell that increases ATK of face-up monsters, you will be able to search out a monster that has less ATK than the monster with the modified ATK ("Mystic Plasma Zone" on a "Blackwing - Shura the Blue Flame" will get any "Blackwing" non-Synchro Monster except "Blackwing - Kogarashi the Wanderer").