Ok here is the situation.

I have uni on the field.
My opp. atk.'s
I activate Tornado Wall

Question: Does my monster die if the atk. is weaker than my opp.'s monster? Does tornado wall act like a waboku?

No. Waboku makes all battle damage 0. Tornado Wall just makes the damage to your LP 0. So, it's more like Spirit Barrier than Waboku.

Your monsters will still die, but you wont take any damage from it.

Think of Tornado Wall as a continous Kuriboh, damage to your Life Points is reduced to 0, but the monster would still die if it's atk or def is lower then your opponent's monster.

One way to look at it is the wording.

Waboku
Normal Trap
Make all Battle Damage inflicted by monsters on your opponent's side of the field 0 during this turn.

Tornado Wall
Continuous Trap
This card can only be activated when "Umi" is active on the field. As long as "Umi" remains face-up on the field, any damage from attacking monsters to your Life Points becomes 0. When "Umi" is removed from the field, this card is also destroyed.

Other similar cards


Amazoness Fighter
Earth/Warrior/4/1500/1300
All Battle Damage to this card's controller that he/she takes from a battle involving this monster becomes 0.

Spirit Barrier
Coninuous Trap
As long as a monster(s) remain(s) on your side of the field, battle damage to the controller of this card becomes 0.

Kuriboh
Dark/Fiend/1/300/200
Discard this card from your hand. Make the Battle Damage inflicted to your Life Points by 1 of your opponent's monsters 0. You can only use this effect during your opponent's Battle Phase.

Hallowed Life Barrier
Normal Trap
Discard 1 card from your hand. During this turn, any damage you take from your opponent becomes 0.


See, Waboku reduces ALL battle damage to 0, not just damage to your lifepoints like all the other cards state.