horus yugioh cards the Black Flame Dragon | Yu-Gi-Oh! Wiki when a Spell Card is activated during your opponents Main Phase NEW HORUS CARDS!! This Is

But hey, whatever, it makes them drop like a stone in price so collectors like me can scoop 'em up cheap

That may sound extreme, but since the rules ensure priority has to pass all the way around the table (in turn order, starting with the player whose turn it is) before each spell resolves and between each step and phase of a turn, everyone is still able to play effects at the moments they need to

Reiki, the History of Kamigawa draws cards, Saryth, the Vipers Fang gives your creatures deathtouch or hexproof, Zopandrel, Hunger Dominus doubles power and toughness, and Ghalta, Stampede Tyrant gives you an army for free

The issue with that background though is that its entirely linked to your commander