Hexplate Wallbreaker

Mana cost: {3}{R}{R}
Type: Artifact — Equipment
Set: Phyrexia: All Will Be One Commander #14 (rare)
Price: $6.91 USD

For Mirrodin! (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.)
Equipped creature gets +2/+2.
Whenever equipped creature attacks, if it's the first combat phase of the turn, untap each attacking creature. After this phase, there is an additional combat phase.
Equip {3}{R}

Hexplate Wallbreaker has 2 printings, first in Phyrexia: All Will Be One Commander (2023). EDHREC ranks it #3,705 among Commander cards. It appears most in Cloud, Ex-SOLDIER decks (4,936 on EDHREC). 1 public deck on TCG runs it. It has 7 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: not legal
pioneer: not legal
standard: not legal
brawl: not legal

Public decks that run Hexplate Wallbreaker

Rebellion Rising - Phyrexia: All Will Be One Commander, led by Neyali, Suns' Vanguard

Commanders that run Hexplate Wallbreaker most

Deck counts from EDHREC.

Cloud, Ex-SOLDIER: 4,936 decks
Nahiri, Forged in Fury: 4,383 decks
Captain America, First Avenger: 3,003 decks
Otharri, Suns' Glory: 2,213 decks
Gilgamesh, Master-at-Arms: 1,702 decks
Neyali, Suns' Vanguard: 1,307 decks
Tony Stark // The Invincible Iron Man: 1,244 decks
Sephiroth, Fallen Hero: 1,103 decks

Often played with Hexplate Wallbreaker

Cards that show up in the same decks on EDHREC.

Rulings

2023-02-04: There's no main phase between your combat phases, so you'll have no opportunity to cast spells or activate abilities that could only be activated any time you could cast a sorcery. For example, you won't be able to cast another creature or activate Hexplate Wallbreaker's equip ability between combats.
2023-02-04: If you attack with multiple creatures equipped with Hexplate Wallbreakers in one combat phase (or one creature equipped with multiple Hexplate Wallbreakers), you'll have that many additional combat phases, but your attacking creatures are untapped only during the current combat phase.
2023-02-04: If the ability causes two Rebel tokens to be created (due to an effect such as that of Mondrak, Glory Dominus), the Equipment becomes attached to only one of them.
2023-02-04: The Rebel enters the battlefield as a 2/2 creature, then the Equipment becomes attached to it. Abilities that trigger when a creature enters the battlefield see that a 2/2 creature entered the battlefield.
2023-02-04: If the Rebel is destroyed, the Equipment stays on the battlefield. Similarly, you may pay its equip cost to move it from the Rebel token to another creature you control.
2023-02-04: Once the equipped creature attacks and the triggered ability resolves, you get an additional combat phase even if the equipped creature doesn't survive the first combat phase.
2023-02-04: Untapping an attacking creature doesn't remove it from combat.