The Ascendant Dice in AOTR appears to increase the stat you already have on an item or artifact by a small amount , rather than rerolling it or replacing it entirely.

What that means

  • If a stat is already rolled, the dice boosts that same stat further.
  • Example: if your Shifter Damage is already at 8.5/10.5, using the dice raises that value instead of changing it to a different stat.

In plain terms

It’s basically a stat booster for already-existing rolls, so it helps push a good item a bit higher instead of giving you a brand-new result.

Quick note

The clearest public explanation I found is from a player post, so the exact amount can still depend on the item or current game version.