Bloodcrazed Goblin — ruling 1

For Bloodcrazed Goblin to be able to attack, an opponent must have been dealt damage that turn before the declare attackers step begins. The damage must have been noncombat damage of some sort, or it was combat damage and an additional combat phase has been created.

Bloodcrazed Goblin — ruling 2

It doesn’t matter how an opponent was dealt damage, or even who controlled the source of the damage.

Bloodcrazed Goblin — ruling 3

If damage would have been dealt to an opponent but it was all prevented, redirected, or otherwise replaced, Bloodcrazed Goblin won’t be able to attack.

Bloodcrazed Goblin — ruling 4

Bloodcrazed Goblin’s ability checks only whether damage was dealt to an opponent. It doesn’t care whether that opponent also gained life. For example, if an opponent was dealt 4 damage and gained 6 life during the turn, that player will have a higher life total than they started the turn with — but Goblin Berserker will still be able to attack.

Bloodcrazed Goblin — ruling 5

If Bloodcrazed Goblin attacks, it doesn’t have to attack the opponent who was dealt damage. It can attack a planeswalker. In a multiplayer game, it can attack a different opponent.

Bloodcrazed Goblin : règles, fonctionnement et interactions (MTG)

Bloodcrazed Goblin 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

This creature can't attack unless an opponent has been dealt damage this turn.

How it works : Bloodcrazed Goblin

Original English text — Wizards of the Coast / Scryfall

#1August 15, 2010· Wizards of the Coast
For Bloodcrazed Goblin to be able to attack, an opponent must have been dealt damage that turn before the declare attackers step begins. The damage must have been noncombat damage of some sort, or it was combat damage and an additional combat phase has been created.
No other card is named in this ruling.
#2August 15, 2010· Wizards of the Coast
It doesn’t matter how an opponent was dealt damage, or even who controlled the source of the damage.
No other card is named in this ruling.
#3August 15, 2010· Wizards of the Coast
If damage would have been dealt to an opponent but it was all prevented, redirected, or otherwise replaced, Bloodcrazed Goblin won’t be able to attack.
No other card is named in this ruling.
#4August 15, 2010· Wizards of the Coast
Bloodcrazed Goblin’s ability checks only whether damage was dealt to an opponent. It doesn’t care whether that opponent also gained life. For example, if an opponent was dealt 4 damage and gained 6 life during the turn, that player will have a higher life total than they started the turn with — but Goblin Berserker will still be able to attack.
No other card is named in this ruling.
#5August 15, 2010· Wizards of the Coast
If Bloodcrazed Goblin attacks, it doesn’t have to attack the opponent who was dealt damage. It can attack a planeswalker. In a multiplayer game, it can attack a different opponent.
No other card is named in this ruling.