Ember Orb

Raises the modifier you pick on the bench by one tier, with a new value in that tier (used directly: a random unbound one that can still rise).

What it does

Raises the modifier you pick on the bench by one tier, with a new value in that tier (used directly: a random unbound one that can still rise).

Only an item with a rarity and a modifier that is not bound and below the top tier (T8).

Uniques, ruined and corrupted items and stacks are refused; the crafting bench shows what an orb would do before you use it.

Used directly: Use with on the orb, then click the item.

Source	How
Monster drops	Per kill by monster tier: Normal 0.04%, Magic 0.12%, Rare 0.24%, Legendary 6%, Boss 10%; 1 at a time. Legendary monsters and bosses also drop one guaranteed currency item, this one 2.7% of the time.
Salvage	Combine 50 rune shards into one at the crafting bench.
Ember Shards	Combine 1,000 Ember Shards into one at the crafting bench (Salvage tab; Ctrl+click: up to 10).
Salvage bonus	Salvaging gear with a rarity sometimes gives a whole orb (0.5%-3% per item by rarity); 2.8% of those are this one.