Awww, the AI apparently thinks I'm incredibly overpowered. I'm not touching that flavour text though.
Considering my default deckbuilding strategy was always to load up on control-based instants, I think it's surprisingly appropriate.
I also don't know how good any of these effects are by the way.
So by my reading:
You're not bad at all. I think you're actually a bit undercosted for a 2/2 flying creature. However your effect is kind of anti-synergetic. If it was "destroy a creature
without flying" you'd be really strong. As it is, you're a flying creature who destroys other flying creatures if you don't get blocked (but those flying creatures can block you because they have flying, so I'm not sure why your opponent would ever take the hit).
Brawlman's activated effect is great, but the card itself is ludicrously overpriced to play for a creature you're supposed to sacrifice. Reduce its mana cost by 2 and it would be a great card.
Dalisclock's activated effect is also great, although again I think again the mana cost to play the card itself is a bit too high. Spending that much on a activated ability based creature which can be destroyed with a single point of damage seems very risky.
Casual Shinji is honestly pretty great. A 1/1 with flying will usually cost 2 mana minimum regardless, and the activated effect could be genuinely strong in certain combo situations.
Rogue Wolf is a pretty solid and well balanced card that I think would be quite fun to play with or against.