Idea for Mords Ult

Whenever enslaves the dragon, he loses his ghost and the ability to ult. This is a problem if Mordo wishes to keep his ghost or ability to ult, as simply attacking the dragon curses it, so instead of helping with drag, you're simply forced to stand there. This is worst if an enemy you're fighting is in the drag pit, as using your W or E will also curse the dragon, meaning if your team decides to kill it, you likely won't be able to use your ult later or will lose your ghost if you wanted to keep the one you have for some reason.

Here's my idea: You curse the dragon by holding your ultimate's cast button over it for 1 second (so you don't accidentally ult someone instead of cursing the dragon or vise versa). You're ult won't damage the dragon neither will it go on cooldown, and attacks and spells refresh the curse (which still lasts 10 seconds).

This way, later on when cursed champs may be stronger than the dragon or you simply want the damage of your ult, you can choose not to curse the dragon while still fighting it. If him being able to curse dragon from a range is a problem, the curse could only work if he's damaged the dragon while it's cursed or in a certain amount of time beforehand.