Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Arachnus Web 
Enchantment — Aura · Common · Magic 2012 · #163
Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy this Aura.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 136 | Common | $0.35 | $0.49 |
| Magic 2012 | 163 | Common | $0.35 | $0.49 |
| Modern Masters 2017 | 118 | Common | $0.35 | $0.49 |
| The List | MM3-118 | Common | $0.35 | — |
6 rulings from Wizards of the Coast
- 8 June 2016Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities and will have colons in their reminder text.
- 14 March 2017If the enchanted creature's power isn't 4 or greater when the end step begins, the last ability won't trigger at all.
- 14 March 2017Arachnus Web's triggered ability checks at the beginning of each end step, not just yours.
- 14 March 2017If Arachnus Web's last ability triggers, but the enchanted creature's power is reduced to 3 or less before the ability resolves, the ability will have no effect. Arachnus Web won't be destroyed.
- 14 March 2017Triggered abilities (starting with "when," "whenever," or "at") are unaffected.
- 14 March 2017If Arachnus Web enters the battlefield attached to an attacking or blocking creature (due to Arachnus Spinner's ability, for example), that creature will continue to attack or block.