Cheapest priced copy (Ice Age): $0.79 at Card Kingdom, near mint, their price list as of .
Mystic Might 
Enchantment — Aura · Rare · Ice Age · #86
Enchant land you control
Cumulative upkeep {1}{U} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Enchanted land has "{T}: Target creature gets +2/+2 until end of turn."
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ice Age | 86 | Rare | $0.79 | — |