Cheapest priced copy (Invasion): $0.49 at Card Kingdom, near mint, their price list as of .
Tek 
Artifact Creature — Dragon · 2/2 · Rare · The List · #INV-313
This creature gets +0/+2 as long as you control a Plains, has flying as long as you control an Island, gets +2/+0 as long as you control a Swamp, has first strike as long as you control a Mountain, and has trample as long as you control a Forest.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper