That kind of redundancy among combo cards is a boon for any deck, but its not even that easy to take those individual pieces out, as anyone who has played against Cat Oven combo in Constructed will tell you
Secondly, unlike the other covered mechanics, indestructible is weak against specific classes of cards
In practice, this will likely mean your opponents will play all their artifacts and creatures tapped, but that's still a big effect for a two-mana vampire soldier
Sword of Hearth and Home and a way to either attack with another unblocked creature that can flicker Aurelia or a way to auto-equip, such as Ardenn, Intrepid Archaeologist, can help combo in this way
If it was a permanent, you put a +1/+1 counter on Lion Sash