Board Thread:General Discussion/@comment-2001:4CA0:0:F226:5DC3:F3C1:2652:DAA2-20170826174850

They can counter it provided the skill is better.

A lv. 8 gyo can't see a lv. 10 In conjuration, but a Lv 8 In cannot hide from a lv. 10 Gyo.

En can detect physical bodies anyway but the same argument goes if we consider emitted bodies veiled in In. 