Anthem of Rakdos — ruling 1

The hellbent ability doubles the damage dealt to you by Anthem of Rakdos itself.

Anthem of Rakdos — ruling 2

The first ability triggers once for each creature you attack with. If you attack with three creatures, for example, they’ll each get +2/+0 and you’ll be dealt 3 damage.

Anthem of Rakdos — ruling 3

If damage that would be dealt to a player or creature is affected by both Anthem of Rakdos and a damage prevention effect, that player or that creature’s controller chooses the order to apply the effects. In most cases that player will want to prevent damage, then double what’s left.

Anthem of Rakdos — ruling 4

If a source you control would deal damage to multiple creatures and/or players simultaneously, all of that damage is doubled.

Anthem of Rakdos : règles, fonctionnement et interactions (MTG)

Anthem of Rakdos 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

Whenever a creature you control attacks, it gets +2/+0 until end of turn and this enchantment deals 1 damage to you. Hellbent — As long as you have no cards in hand, if a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

How it works : Anthem of Rakdos

Original English text — Wizards of the Coast / Scryfall

#1May 1, 2006· Wizards of the Coast
The hellbent ability doubles the damage dealt to you by Anthem of Rakdos itself.
No other card is named in this ruling.
#2May 1, 2006· Wizards of the Coast
The first ability triggers once for each creature you attack with. If you attack with three creatures, for example, they’ll each get +2/+0 and you’ll be dealt 3 damage.
No other card is named in this ruling.
#3May 1, 2006· Wizards of the Coast
If damage that would be dealt to a player or creature is affected by both Anthem of Rakdos and a damage prevention effect, that player or that creature’s controller chooses the order to apply the effects. In most cases that player will want to prevent damage, then double what’s left.
No other card is named in this ruling.
#4May 1, 2006· Wizards of the Coast
If a source you control would deal damage to multiple creatures and/or players simultaneously, all of that damage is doubled.
No other card is named in this ruling.