User blog comment:Degritone/Imad, the Tethered Soul/@comment-25280175-20150205201944/@comment-25364408-20150205212525

His passive does not stack, no. Casting multiple abilities only refreshes the duration of the heal, meaning quickly casting all of his abilities would be the way to lose health, as he'd lose a lot of health, but only heal for a very small amount over 4% max health.

It's not stealing MS, as the enemy keeps their MS. It's more like Veigar Ult in terms of functionality, but for an MS buff rather than AP-based damage.

They'd just stay there, but anyone more than 500 range away from the jump target, but still got caught by the ult, would be pulled along. And like I said below, it's more like a Jarvan ult, but movable, wider, and with a shorter duration than an AOE Skarner ult.