Shadowspear

Mana cost: {1}
Type: Legendary Artifact — Equipment
Set: Tales of Middle-earth Commander #383 (mythic)

Equipped creature gets +1/+1 and has trample and lifelink.
{1}: Permanents your opponents control lose hexproof and indestructible until end of turn.
Equip {2}

Shadowspear has 11 printings, first in Theros Beyond Death (2020). EDHREC ranks it #307 among Commander cards. It appears most in Cloud, Ex-SOLDIER decks (10,249 on EDHREC). 1 public deck on TCG runs it. It has 3 official rulings.

Legality

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

Public decks that run Shadowspear

Heads I Win, Tails You Lose - Secret Lair Drop, led by Zndrsplt, Eye of Wisdom

Commanders that run Shadowspear most

Deck counts from EDHREC.

Cloud, Ex-SOLDIER: 10,249 decks
Sauron, the Dark Lord: 9,886 decks
Captain America, First Avenger: 6,638 decks
Anti-Venom, Horrifying Healer: 6,579 decks
Kotis, the Fangkeeper: 5,689 decks
Jin Sakai, Ghost of Tsushima: 5,598 decks
Valgavoth, Harrower of Souls: 5,102 decks
Ragost, Deft Gastronaut: 4,778 decks

Often played with Shadowspear

Cards that show up in the same decks on EDHREC.

Rulings

2020-01-24: If a permanent enters the battlefield under an opponent's control with hexproof or indestructible after Shadowspear's second ability resolves, it won't lose that ability unless you activate Shadowspear's second ability again. The same is true if an opponent's permanent gains indestructible or hexproof after Shadowspear's second ability resolves.
2020-01-24: You can activate Shadowspear's second ability whether or not it's equipped to a creature.
2020-01-24: Because damage remains marked on a creature until the damage is removed as the turn ends, damage previously dealt to a creature with indestructible may cause it to be destroyed if Shadowspear's second ability resolves during that turn.