"Shard Conversion" / "Shard Forging"

[Promethean]

No. Rune of Shattering is destroy item and get a random number of shards based on the affixes. The new rune is remove one affix from item. Get shards equal to tier of affix. Item still exists minus one affix. The new rune makes target farming shards much easier.

[Llama8]

Well it wasn’t teased here, unless Mike did it on the stream last week (which I missed).

[Promethean]

Yes it is. Rune of Removal (yes, I had forgotten its name until checking it through that link just now). It even has a big picture in the thread showing its upcoming tooltip. Its the only rune in that picture too.

[Heavy]

Bolded part and tooltip does state the new functionality

@Trasochi

Changes to Existing Runes

[…]

• As discussed above the Rune of Removal could lead to moments of frustration when it removed the one affix that made the item exciting for you in the first place. Of course the Glyph of Chaos provides an alternative now, but if you do want to use the Rune of Removal, the edge will be taken off the disappointment, because it’ll return a number of shards of the removed affix equal to its tier. This will allow you to more easily craft that affix onto a different item instead. This also opens up the strategy of using multiple Runes of Removal instead of a Rune of Shattering if you want to maximize the number of Shards you get from an item.