Negating Summons: Activations(Part 2)

Now that we have a basic understanding of negating summons, we can talk about  "activating a card" VS "activating the effect of a card" This is important as this affects how we can negate the summon of continuous spell cards like Call Of The Mummy and Valhalla, Hall Of The Fallen.

"Once per turn: You can Special Summon 1 Zombie-Type monster from your hand. You must control no monsters to activate and to resolve this effect."

This sounds really simple doesn't it? However, many people do not realize that once Call Of The Mummy is active on the field (and when i say active, i mean it is face-up on the field for a few turns already), the player is "activating the effect of a card" not "activating a card" if he chooses to use its effect. Cards like Solemn Warning cannot be used to negate the summon as Solemn Warning negates "activating a card". However, a player can still negate the activation of Call Of The Mummy with Solemn Judgement if Call Of The Mummy is played from the hand, since playing Call Of The Mummy from the hand is considered as "activating a card" and starts a chain link.

So what this means is that a special summon using Call Of The Mummy cannot be negated by cards such as Solemn Warning, Solemn Judgement and Black Horn Of Heaven, since the special summon is due to the "activating the effect of a card". However, this is not the case with Royal Oppression.

"Either player can pay 800 Life Points to negate the Special Summon of a monster(s), and/or an effect that Special Summons a monster(s), and destroy those cards" 

What do we know about Royal Oppression? It is a continuous trap card with a Quick-like Effect. And yes, it is a banned card. If Royal Oppression and Call Of The Mummy are both face up on the field, Royal Oppression can be used to negate the special summon of Call Of The Mummy, since this is stated implicitly in Royal Oppression card text which i have highlighted in blue. The highlighted portion in blue is targeted against "activating the effect of a card". Also note that Royal Oppression effect cannot be used in the Damage Step, so it cannot be used to negate the special summon of Gorz The Emissary Of Darkness if it is special summoned when the player takes battle damage. Another card worth taking note of is Imperial Order. And yes, it is another banned card.

 "As long as this card remains face-up on the field, negate the effects of all spell cards on the field. Pay 700 Life Points during each of your StandBy Phases. If you do not, this card is destroyed."

For the same reasoning, Imperial Order works against cards like Call Of The Mummy. The card text in red simply negates the effect of Call Of The Mummy when a player tries to "activate the effect of a card". But this card has also been banned for a long time so........

Question: Can Solemn Warning be used to negate a special summon using Water Hazard? I leave it to the reader to decide.......