Faith's Fetters

Mana cost: {3}{W}
Type: Enchantment — Aura
Set: Duel Decks Anthology: Divine vs. Demonic #20 (common)
Price: $0.42 USD

Enchant permanent
When this Aura enters, you gain 4 life.
Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.

Faith's Fetters has 15 printings, first in Ravnica: City of Guilds (2005). EDHREC ranks it #12,955 among Commander cards. It appears most in Kalemne, Disciple of Iroas decks (101 on EDHREC). 3 public decks on TCG run it. It has 3 official rulings.

Legality

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

Public decks that run Faith's Fetters

Enchantress Rubinia - Magic Online Theme Decks, led by Rubinia Soulsinger
Wade into Battle - Commander 2015, led by Kalemne, Disciple of Iroas
Wade into Battle - Commander Anthology Volume II, led by Kalemne, Disciple of Iroas

Commanders that run Faith's Fetters most

Deck counts from EDHREC.

Often played with Faith's Fetters

Cards that show up in the same decks on EDHREC.

Rulings

2020-11-10: If the target permanent is an illegal target by the time Faith's Fetters tries to resolve, it doesn't resolve. It won't enter the battlefield, so its enters-the-battlefield ability won't trigger.
2020-11-10: Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords (such as equip) are activated abilities and will have colons in their reminder text. Loyalty abilities of planeswalkers are activated abilities.
2020-11-10: Faith's Fetters doesn't stop static abilities, triggered abilities, or mana abilities from working. A mana ability is an ability that produces mana, not an ability that costs mana.