Tek gets +0/+2 as long as you control a Plains, has flying (This creature can't be blocked except by creatures with flying or reach.) as long as you control an Island, gets +2/+0 as long as you control a Swamp, has first strike (This creature deals combat damage before creatures without first strike.) as long as you control a Mountain, and has trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) as long as you control a Forest.