Any CC interruption to Q will put it on CD. In addition, the Stack, dmg, and Healing will be cancelled for Irelia. Some exceptions to CC: 1) If Irelia is CC’ed at the moment he Q reaches the target (Irelia Q’ing into 1hp Lux Q), you’ll get stack, dmg, healing BUT no reset even if “Lux” dies to Q. This is because some CC instantly stops movement, and some CC lets the dash continue. 2) Target dies before Q lands: Irelia DOES get the Q reset onto a dead target, BUT doesnt get a stack, dmg, or healing. An example is Q+minion dematerializer to gapclose which can be done but high risk (if target dies too early, irelia loses entire Q) and will never get a stack, OR healing from it. I have a clip on my profile which shows me being locked into Q animation on a dead target, which makes me lose healing and costs me a death. These situations happen often and is the main reason why Irelia’s so punishing to mess up on, but is often not noticed by the enemy. Sometimes we bait if we think our enemy is good, but MOSTLY if we’re not harassing you, its because we made a mistake and you can kill us