Forum:Lava Dragon

I was wondering, since the effect for lava dragon was "You can Tribute this face-up Defense Position card to Special Summon 1 Level 3 or lower Dragon-Type monster either from your hand and Graveyard." and not so long ago, i thought that by its effect, i can summon 2 dragons, instead of one.So my question is does lava dragon summon 2 or 1 dragon?