Forum:Negating effects vs cards who's effects are either lingering or have already resolved

So, in duels my opponent keeps using the effect of Effect Veiler to negate the effect of my Endless Decay. However, this confuses me, as all of Endless Decay's effect refers to its summoning conditions and when it is summoned. They seem to think that if they negate its effect its attack will drop to zero, but i am honestly not sure. There is no rulings that can support nor disprove me, so it is very confusing. Any help in understanding would be great. 204.210.153.130 (talk) 13:29, June 18, 2012 (UTC)