Orb of Decay

Fire an unblockable orb that passes through enemies, deals 90% weapon damage and inflicts Disintegrate, dealing 5% weapon damage per second and reducing target's armor by 10% for 8s. (Stacks up to 3 times.) At max range, it transforms into a healing orb and returns, healing friendlies for 20% weapon damage per second for 5s. (Healing scales exclusively with Focus.) Costs 20 mana.