I could see it for PvP purposes, but there aren't many PvE applications unless someone is prone to stepping into the Cabal's flame jets. Would be nice to speed kill the grenade burn/Viking Funeral trick from Sunsingers.

it could be used to slow down DoT whilst in wizard bubbles or something, i'm like 50% sure there's something DoT -y in the raid but i can't remember but if there is one then it could be used for that

In the VoG there is the blinding effect from the time portals and then there is the lockdown bubbles (can't remember what they are called). In TDB the only thing that comes to mind other than wizards is the negated healing when fighting Crota. In PoE the fight against the flame knight hive boss he does the lava floor trick. In TTK there is the totem room but the makers were pretty clear on their opinion of that room, removing the sword glitch and all that. Those are the only ones I can think of, but they are pretty specific circumstances.

Good concept, but whenever I read it, I can't help but think of [url=http://www.d20monkey.com/comic/the-sword-of-healing/]this.[/url]. Would be pretty cool though

just because of that picture i think rose should have like a 1/1000 chance of insta-killing your teammate just because its funny