Seems like it would overshadow RoL Hope a bit too much... Why not have each one of these absorb a fixed amount of damage per turn each turn, but from every type, not just physical.
Maybe something like:
"Absorbs 2 damage to you from any source each turn.
![Aether :aether](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/aether18x18.png)
: Add a copy of this card to your hand"