Arrest

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Sigarda's Aid

You may cast Aura and Equipment spells as though they had flash.
Whenever an Equipment you control enters, you may attach it to target creature you control.

Steelshaper's Gift

Search your library for an Equipment card, reveal that card, put it into your hand, then shuffle.

Plains

Leonin Den-Guard

As long as this creature is equipped, it gets +1/+1 and has vigilance.

Vorrac Battlehorns

Equipped creature has trample and can't be blocked by more than one creature.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Sword of Vengeance

Equipped creature gets +2/+0 and has first strike, vigilance, trample, and haste.
Equip {3}

Fencing Ace

Double strike (This creature deals both first-strike and regular combat damage.)

Sunspear Shikari

As long as this creature is equipped, it has first strike and lifelink. (It deals combat damage before creatures without first strike. Damage dealt by it also causes you to gain that much life.)

Open the Armory

Search your library for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.

Brass Squire

{T}: Attach target Equipment you control to target creature you control.

Lunarch Inquisitors

When this creature transforms into Lunarch Inquisitors, you may exile another target creature until this creature leaves the battlefield.

Avacynian Missionaries

At the beginning of your end step, if this creature is equipped, transform it.

Avacynian Missionaries // Lunarch Inquisitors

Bone Saw

Equipped creature gets +1/+0.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Argentum Armor

Equipped creature gets +6/+6.
Whenever equipped creature attacks, destroy target permanent.
Equip {6}

Sword of Kaldra

Equipped creature gets +5/+5.
Whenever equipped creature deals damage to a creature, exile that creature. (Exile it only if it's still on the battlefield.)
Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)

Kor Duelist

As long as this creature is equipped, it has double strike. (It deals both first-strike and regular combat damage.)

Short Sword

Equipped creature gets +1/+1.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Auriok Windwalker

Flying
{T}: Attach target Equipment you control to target creature you control.

Stone Haven Outfitter

Equipped creatures you control get +1/+1.
Whenever an equipped creature you control dies, draw a card.