Cheapest priced copy (Secrets of Strixhaven): $0.35 at Card Kingdom, near mint, their price list as of .
Additive Evolution 
Enchantment · Uncommon · Secrets of Strixhaven · #139
When this enchantment enters, create a 0/0 green and blue Fractal creature token. Put three +1/+1 counters on it.
At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. It gains vigilance until end of turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven | 139 | Uncommon | $0.35 | $0.49 |