Card Rulings:Solemn Warning

TCG Rulings

 * You cannot negate the activation of a card that cannot Special Summon a monster, such as Lightning Vortex.


 * You can negate the activation of Macro Cosmos with this card.

OCG Rulings

 * "Solemn Warning" cannot negate the activation of a Spell or Trap Card if the Spell or Trap Card does not include the effect of Special Summoning a monster, such as "Smashing Ground". , "Lightning Vortex", or "Raigeki Break".


 * "Solemn Warning" can be Chained to the activation of a card or the activation of an Effect Monster's effect such as:
 * The activation of an Effect Monster's effect that Special Summons a monster(s), like the effect of "Nimble Momonga" or "Marauding Captain".
 * The activation of a Spell or Trap Card that Special Summons a monster(s), like "Level Modulation" or "Call of the Haunted".
 * The Normal Summon or Flip Summon of a monster, or the Special Summon of a monster like "Cyber Dragon" or "Judgment Dragon".

Mentions in Other Rulings

 * If an effect like "Solemn Warning" or "Royal Oppression" negates the the Synchro Summon of "Voltic Bicorn" or "Lightning Tricorn" or "Scrap Dragon" and destroys it, then you can activate the monster's effect.