Tek is a rare Artifact Creature — Dragon card from The List (PLST), collector number INV-313. Current market price: $0.39, TCGplayer market prices via Scryfall.
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.