The hero releases healing energy, healing all nearby friendly units, removing all negative buffs and immunity again magic damage.
Heals for 6 x Strength on heros, 600 on creeps, range of 1000, immunity lasts 6 seconds.
Totally got a crazy idea. Here goes (I don't have a name for it -_-):
"Links" all friendly units within X aoe of the caster. If a linked unit dies, heal all other linked units by X% of the dying unit's max life. Lasts X seconds.
Alternatively, you could make it only heal the caster. You could also add other buffs, like increased damage by X% of the dying unit's damage until the spell wears off. You could also make the increase in life/damage depend on how many linked units there are, the less units, the higher the percentage.
Hope you like it, because I just suddenly came up with it when I saw this XD.