Potion Effect Type - Is Instant (Condition) — Skript
Addon: Skript · Category: Condition · Since: 2.14
Syntax
%potioneffecttypes% (is|are) instantDescription
Checks whether a potion effect type is instant. That is, whether the effect happens once/immediately.
Examples
if any of the potion effects of the player's tool are instant:
message "Use your tool for immediate benefits!"