Cheapest priced copy (Coldsnap): $0.49 at Card Kingdom, near mint, their price list as of .
Shape of the Wiitigo 
Enchantment — Aura · Rare · Coldsnap · #120
Enchant creature
When this Aura enters, put six +1/+1 counters on enchanted creature.
At the beginning of your upkeep, put a +1/+1 counter on enchanted creature if it attacked or blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.49 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Coldsnap | 120 | Rare | $0.49 | $3.49 |
One ruling from Wizards of the Coast
- 15 July 2006If Shape of the Wiitigo leaves the battlefield but the creature doesn't, the +1/+1 counters stay on the creature.