Here is the scenario of what happened in my Arena Match tonight: I had my Warlock buffed fairly well with Enchantments. I had three nullifies, one Reverse Magic and one Arcane Ward in my book. What my opponent did was use his QC to cast dissolve, which he knew he was wasting- dissolve's target says Mage, so it automatically triggers Nullify, which then freed him up to use his action to cast Purge Magic which removed all my enchantments. I can't place both Nullify AND Reverse Magic at the same time, because one spell would trigger both making one pointless.
How can I counter this tactic for future reference???