Dralnu's Crusade — ruling 1

Under Dralnu's Crusade, Goblins are black only, not black in addition to any other colors. They are, however, Zombies in addition to their other creature types. As one enters the battlefield, it is already a black Goblin Zombie (and perhaps some other creature types) with +1/+1; it doesn't enter and then become a black Goblin Zombie and get +1/+1.

Dralnu's Crusade : règles, fonctionnement et interactions (MTG)

Dralnu's Crusade is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

All Goblins get +1/+1. All Goblins are black and are Zombies in addition to their other creature types.

How it works : Dralnu's Crusade

Original English text — Wizards of the Coast / Scryfall

#1December 8, 2022· Wizards of the Coast
Under Dralnu's Crusade, Goblins are black only, not black in addition to any other colors. They are, however, Zombies in addition to their other creature types. As one enters the battlefield, it is already a black Goblin Zombie (and perhaps some other creature types) with +1/+1; it doesn't enter and then become a black Goblin Zombie and get +1/+1.
No other card is named in this ruling.