Cheapest priced copy (Amonkhet): $0.35 at Card Kingdom, near mint, their price list as of .
Compulsory Rest 
Enchantment — Aura · Common · Amonkhet · #9
Enchant creature
Enchanted creature can't attack or block.
Enchanted creature has "{2}, Sacrifice this creature: You gain 2 life."
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 9 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 18 April 2017Compulsory Rest grants the activated ability to the enchanted creature. That creature’s controller (not the controller of Compulsory Rest) may activate the ability and gain 2 life.