Watch the enemy's spells carefully and note their effects.
Use rot13.com to decode these:
Hint: Oyhr pelfgnyf pna gryrcbeg bgure pelfgnyf.
Solution: Zbir gur evtug pelfgny qbja, hfr gur yrsg pelfgny gb syvat gur evtug pelfgny npebff gur tnc. Gung bcraf gur jnl gb jnyx qbja naq nebhaq gb gur evtug. Hfr gur cerivbhfyl syhat pelfgny gb syvat lbhefrys gb gur rkvg.