by Dre2Dee2
The warlock should drop Pentagram as a quick action, then move and drop a mana crystal with his full action.Next turn move and drop a mana crystal, quick action drop a battle forge. Get a decent sized blood reaper out, or necropian vampire. You should be able to afford to keep 1 creature around even with upkeeps.
Get your key equipment out: fire ring, elemental wand, then flame lash. Curse your enemy mage and try to keep the battle on their side of the field. Stay aggresive.
Good luck. ;)