Forum:Summoning Effects and resolving those effects

I wanted some clarification on how "when this card is summoned" effects would work... So imma paint a picture for you to better understand my question. I just attacked and detroyed my opponents blue eyes white dragon and in response my opponent activates the effect of "deep-eyes white dragon" from the hand. Which special summons him to the field and thus begins his effects of doing damage to my lifepoints based off the amount of dragons in his graveyard and selecting a monster to copy his attack. Now my question is if i were to active say.. "Floodgate trap hole" immediately after he was special summoned and flipped him into face down defense position that would mean that neither of his effects would be able to activate correct? X1991omega (talk • contribs) 21:48, December 10, 2017 (UTC)