Cheapest priced copy (Kaldheim): $0.35 at Card Kingdom, near mint, their price list as of .
Withercrown 
Enchantment — Aura · Common · Kaldheim · #119
Enchant creature
Enchanted creature has base power 0 and has "At the beginning of your upkeep, you lose 1 life unless you sacrifice this creature."
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kaldheim | 119 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 5 February 2021Any effects that modify the enchanted creature’s power without setting it to a specific value will apply after its base power is set, regardless of the order in which those effects were created. The same is true of counters that modify its power.
- 5 February 2021Withercrown overwrites all previous effects that set the enchanted creature’s power to specific a value. Other effects that set its base power to specific values that start to apply after Withercrown becomes attached to the creature will overwrite this effect.