Quick Effects can both be activated in an open game state as well as a closed one, though it's not all that can be activated in both, as some have a specific timing that responds to something, such as a card or effect being activated
Due to the hype from the 2025 World Championships and Lunalight taking 2nd place, Heavy Polymerization spiked massively as players picked up their cards for Lunalight
-a group of cards named "Sacred" that have been categorized in the "Sacred" category
A cheaper, enchantment version of Syr Konrad, the Grim, so to speak, making it just a tad bit harder to remove
An abundance of removal spells in Constructed, and especially bounce out of the control decks, kept it down in Standard, but probably more than they should have