Minion creatures get +1/+1.
{B}{B}{B}, Exile Balthor the Defiled: Each player returns all black and all red creature cards from their graveyard to the battlefield.
You can only activate this ability if Balthor the Defiled is on the battlefield.
The Legend rule only applies to two legendary permanents with identical names. If the names are different, even if they depict the same character, the rule does not apply.