Based on the difference in the number of shields on both sides, Lin Ye did not doubt that he could cast a Reversal with his Shield of Ineffectiveness. Holy Hymn would drain all the mana on his body in one breath.
Of course, he could also choose not to use the Shield of Inefficiency and use the white shield that was overflowing with health to resist the "backlash" effect of the reversal skill.
However, if Lin Ye wanted to resist the damage from this thing, he had to use several Godkiller-ranked Bright Mirror Water (the original version didn't increase damage and had very weak healing effects) and cast several layers of white shields on himself. He also had to fight with the enemy. Otherwise, the overflowing healing wouldn't turn into a white shield when he was out of battle.
This would undoubtedly result in the loss of a large number of DPS.