1 "Blackwing" Tuner + 1 or more "Blackwing" non-Tuner monsters You can target 1 Level 5 or higher Winged Beast-Type monster in your Graveyard; Special Summon it. During either player's turn, when your opponent activates a card or effect that targets only this card, or when your opponent targets this card for an attack: You can target 1 other "Blackwing" monster you control that would be an appropriate target; that card/effect/attack now targets the new target. You can only use each effect of "Blackwing Tamer - Obsidian Hawk Joe" once per turn.
Lets you choose the attack target when your opponent declares an attack.
Can be costly to summon.
Redirecting an effect requires that you control a different monster to receive it and is generally less efficient than negating an effect.
Can easily be summoned with any level-4 Blackwing monster and Special Summoning Blackwing - Gale the Whirlwind. Another combo is using Blackwing - Simoon the Poison Wind to search Black Whirlwind and Normal Summon him with his effect, search and Special Summon Blackwing - Oroshi the Squall and use both monsters to make Blackwing Tamer - Obsidian Hawk Joe.