Tahngarth, First Mate

Mana cost: {2}{R}{G}
Type: Legendary Creature — Minotaur Warrior
Power / toughness: 5 / 5
Set: Year of the Ox 2021 #4 (rare)

Tahngarth can't be blocked by more than one creature.
Whenever an opponent attacks with one or more creatures, if Tahngarth is tapped, you may have that opponent gain control of Tahngarth until end of combat. If you do, choose a player or planeswalker that opponent is attacking. Tahngarth is attacking that player or planeswalker.

Tahngarth, First Mate has 2 printings, first in Commander 2019 (2019). EDHREC ranks it #16,087 among Commander cards. It appears most in Karona, False God decks (581 on EDHREC). 1 public deck on TCG runs it. It has 9 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 Tahngarth, First Mate

Primal Genesis - Commander 2019, led by Ghired, Conclave Exile

Commanders that run Tahngarth, First Mate most

Deck counts from EDHREC.

Karona, False God: 581 decks

Often played with Tahngarth, First Mate

Cards that show up in the same decks on EDHREC.

Rulings

2019-08-23: If an opponent attacks a player or planeswalker but each creature attacking that player or planeswalker is no longer attacking that player or planeswalker by the time Tahngarth's ability resolves (most likely because they've left the battlefield), that player or planeswalker can't be chosen for Tahngarth to attack. If there's no player or planeswalker to choose this way but you still choose to give the opponent control of Tahngarth, Tahngarth isn't attacking.
2019-08-23: Any effects that say that Tahngarth can't attack or can't attack a certain player (such as that of Propaganda, or if Tahngarth gains defender) affect only the declaration of attackers. They won't stop Tahngarth from becoming an attacking creature through its triggered ability.
2019-08-23: If an opponent is attacking a planeswalker but not that planeswalker's controller, Tahngarth can't attack that player.
2019-08-23: Players can't take any actions between the time you choose to give control of Tahngarth to the attacking player and the time it becomes an attacking creature.
2019-08-23: Commander damage is tracked for each commander. It doesn't matter who controls the commander as it deals damage. If Tahngarth deals 10 damage to one player while under your control and another 11 damage to that same player while under a third player's control, the player loses the game.
2019-08-23: Tahngarth may end up attacking its owner this way.
2019-08-23: Although Tahngarth is an attacking creature if it uses its triggered ability, it was never declared as an attacking creature. This means that abilities that trigger whenever a creature attacks won't trigger when it changes control and becomes attacking.
2019-08-23: If Tahngarth gains menace, it can't be blocked at all.
2019-08-23: Giving control of Tahngarth to an opponent doesn't cause it to become untapped. This means that Tahngarth may end up attacking several times between your turns.