Creep should not only hasten Zerg movement speed but also delay non-Zerg movement speed.
Heat-based attack like fire/flame should sustain and also deal Damage over Time as well as the initial hit damage.
Stab-based attacks like Zerg Melee, Spine Crawler attack, and Protoss Zealot and Dark Templar & Penetrative Attacks like torpedo-based attack such as missiles should decay the target’s armor over time while they are being attacked by that type. This is multiplicative and can go minus similar to how the Brood War Zerg Devourer’s corrosive acid (if i remember that name correctly, over 25 years ago) debuff worked.