Rivaz of the Claw

The casting permission granted by Rivaz’s third ability doesn’t change when you may cast the spell from your graveyard.

The ability that the spell gains as Rivaz’s last ability resolves continues to apply to the permanent that spell becomes after the spell resolves, even if it stops being a Dragon or stops being a creature.

The ability that the spell gains only applies to it once it’s on the battlefield. If the spell is countered before it resolves, that ability will not exile it.