Lightning Greaves

Mana cost: {2}
Type: Artifact — Equipment
Set: Secret Lair Drop #2465 (rare)
Price: $6.16 USD

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}

Lightning Greaves has 56 printings, first in Mirrodin (2003). EDHREC ranks it #13 among Commander cards. It appears most in Kaalia of the Vast decks (30,762 on EDHREC). 39 public decks on TCG run it. It has 2 official rulings.

Legality

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

Public decks that run Lightning Greaves

20 Ways to Win, led by Go-Shintai of Life's Origin
Angels: They're Just Like Us, but Cooler and with Wings - Secret Lair Drop, led by Bruna, the Fading Light
Arcane Maelstrom - Commander 2020, led by Kalamax, the Stormsire
Call the Spirits - Commander 2015, led by Daxos the Returned
Chaos Incarnate - Starter Commander Decks, led by Kardur, Doomscourge
Counterpunch - Commander 2011, led by Ghave, Guru of Spores
Deathdancer Xira - Magic Online Theme Decks, led by Xira Arien
Devour for Power - Commander 2011, led by The Mimeoplasm
Devour for Power - Commander Anthology Volume II, led by The Mimeoplasm
Draconic Domination - Commander 2017, led by The Ur-Dragon
Dungeons of Death - Forgotten Realms Commander, led by Sefris of the Hidden Ways
Eldrazi Unbound - Commander Masters, led by Zhulodok, Void Gorger
Elven Council - Tales of Middle-earth Commander, led by Galadriel, Elven-Queen
Endless Punishment - Duskmourn: House of Horror Commander, led by Valgavoth, Harrower of Souls
Feline Ferocity - Commander 2017, led by Arahbo, Roar of the World
Graveyard Overdrive - Modern Horizons 3 Commander, led by Disa the Restless
Heads I Win, Tails You Lose - Secret Lair Drop, led by Zndrsplt, Eye of Wisdom
Heavenly Inferno - Commander 2011, led by Kaalia of the Vast
Heavenly Inferno - Commander Anthology, led by Kaalia of the Vast
Klingon Fury - Star Trek Commander, led by Worf, Defiant Commander
Limit Break - Final Fantasy Commander, led by Cloud, Ex-SOLDIER
Living Energy - Aetherdrift Commander, led by Saheeli, Radiant Creator
Maestros Massacre - New Capenna Commander, led by Anhelo, the Painter
Mardu Surge - Tarkir: Dragonstorm Commander, led by Zurgo Stormrender

The first 24 of 39, by name.

Commanders that run Lightning Greaves most

Deck counts from EDHREC.

Kaalia of the Vast: 30,762 decks
Valgavoth, Harrower of Souls: 22,846 decks
Krenko, Mob Boss: 22,162 decks
Cloud, Ex-SOLDIER: 22,125 decks
Zhulodok, Void Gorger: 16,473 decks
Isshin, Two Heavens as One: 15,674 decks
Giada, Font of Hope: 15,568 decks
The Ur-Dragon: 14,945 decks

Often played with Lightning Greaves

Cards that show up in the same decks on EDHREC.

Rulings

2020-08-07: If a creature enters the battlefield under your control and gains haste, but then loses it before attacking, it won't be able to attack that turn. This means that you can't use one Lightning Greaves to allow two new creatures to attack in the same turn.
2020-08-07: You can't simply unequip Equipment from a creature. If Lightning Greaves is attached to the only creature you control, you won't be able to attach other equipment to it (or target it with anything else) until you have another creature to which you can attach Lightning Greaves.