Cheapest priced copy (Commander 2019): $0.69 at Card Kingdom, near mint, their price list as of .
Bloodthirsty Blade 
Artifact — Equipment · Uncommon · The List · #C21-235
Equipped creature gets +2/+0 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)
{1}: Attach this Equipment to target creature an opponent controls. Activate only as a sorcery.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
7 printings · $0.69 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2019 | 53 | Uncommon | $0.69 | — |
| Commander 2021 | 235 | Uncommon | $0.79 | — |
| Commander Legends: Battle for Baldur's Gate | 854 | Uncommon | $0.79 | — |
| Game Night: Free-for-All | 114 | Uncommon | $0.69Out of stock | — |
| Murders at Karlov Manor Commander | 225 | Uncommon | $0.69 | — |
| New Capenna Commander | 362 | Uncommon | $0.69 | — |
| The List | C21-235 | Uncommon | — | — |
7 rulings from Wizards of the Coast
- 23 August 2019You still control Bloodthirsty Blade while it's equipped to an opponent's creature. You can move it any time you could cast a sorcery; the equipped creature's controller can't.
- 23 August 2019Bloodthirsty Blade has no equip ability. There's normally no way to have it attached to your own creature, although certain combinations of other cards make this possible.
- 30 June 2023If the creature doesn't meet any of the above exceptions and can attack, it must attack a player other than the controller of the spell or ability that goaded it if able. If the creature can't attack any of those players but could otherwise attack, it must attack a planeswalker an opponent controls, a battle an opponent controls, or a player who goaded it.
- 30 June 2023Being goaded isn't an ability the creature has. Once it's been goaded, it must attack as detailed above even if it loses all abilities.
- 30 June 2023If a creature you control has been goaded by multiple opponents, it must attack one of your opponents that hasn't goaded it, as that fulfills the maximum number of goad requirements. If a creature you control has been goaded by each of your opponents, the creature must attack an opponent (rather than a planeswalker or battle), but you choose which opponent it attacks.
- 30 June 2023Attacking with a goaded creature doesn't cause it to stop being goaded. If there is an additional combat phase that turn, or if another player gains control of it before it stops being goaded, it must attack again if able.
- 30 June 2023If, during a player's declare attackers step, a creature that player controls that's been goaded is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under that player's control continuously since the turn began (and doesn't have haste), then it doesn't attack. If there's a cost associated with having a creature attack a player, its controller isn't forced to pay that cost, so it doesn't have to attack that player.