Archon of Absolution — ruling 1

Your opponents can choose not to pay to attack with a creature that attacks “if able.” If there's no other player or planeswalker to attack, that creature simply doesn't attack.

Archon of Absolution — ruling 2

In a Two-Headed Giant game, creatures can attack your teammate and planeswalkers your teammate controls without requiring a mana payment.

Archon of Absolution : règles, fonctionnement et interactions (MTG)

Archon of Absolution 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

Flying Protection from white (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything white.) Creatures can't attack you or planeswalkers you control unless their controller pays for each of those creatures.

How it works : Archon of Absolution

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2019· Wizards of the Coast
Your opponents can choose not to pay to attack with a creature that attacks “if able.” If there's no other player or planeswalker to attack, that creature simply doesn't attack.
No other card is named in this ruling.
#2October 4, 2019· Wizards of the Coast
In a Two-Headed Giant game, creatures can attack your teammate and planeswalkers your teammate controls without requiring a mana payment.
No other card is named in this ruling.