If you put quintessence on a Seraph, it can get out of it by using its ability turning the permanent quintessence into its temporary one.
Because of this it ignores the effect of Shard of Wisdom.
Scenario where it is a problem:
I play a deck using mirror shield, and quint + SoW on enemy creatures, so they hit themselves with the spell attack reflected from my shield.
When the enemy plays Seraph and I put the quint + SoW on it , it is broken when he uses its ability on the already quinted seraph and that also removes the SoW effect.
