This card can attack your opponent directly, but when it does so using this effect, the battle damage inflicted to your opponent is the original ATK of this card. At the end of the Damage Step, if this card attacked or was attacked: You can change this card to Defense Position.
Can attack directly.
Direct attack damage stays at 800, even if its attack is lowered (unless its attack is 0)
Direct attack damage stays at 800, even if its attack is increased.
Even if your attack is reduced from Tryce's effect, it will still deal 800 damage per hit. Ignoring your opponent's monster, if your attacks aren't negated, you can deal 1600 damage per turn. You can pair this up with cards like Anti-Magic Arrows to make sure your attacks go through, or Super Rush Headlong for protection.
With 0 atk it cannot inflict damage, so that effect does not count. 0 atk sometimes have seemingly wierd interactions. This is one of them. An other is Slyfer's effect can't destroy a monster that has 0 atk when summoned.
This + twin swords of flashing light tryce ( if, I'm not mistaken) = good combo 1.6k per turn, but if temple of the minds eye is active, will it be 2k or just. 1.6k damage?