Here are some of my level 68 spell ideas, hope you enjoy.
Fire: Secret Flames 640 Damage. Not affected by target's shields or defensive auras. It is affected by, blades, traps, offensive auras, and weakness. Animation: A huge flame appears in the battlefield, slowly growing bigger and bigger. Then, at full height it seeps into the ground and explodes at the target while burning the target as well.
Death: Undead Army 750 Damage. Converts half to health. Summons a summoned soul minion (5-pip animate minion) to aid the user. In a 4v4 duel, minion will not be summoned. Animation: Scene slowly shows a creepy graveyard with crows flying and making noises. Suddenly, a hand reaches out of one of the graves, then another, then about 10 other skeletons, ghosts, ghouls, and banshees erupt out of their graves and charge at the target. They attack him like the forest lord spell, with scratches and slashes. Then the monsters rip out a blue orb out of the target dealing the damage. They bow at the user making the orb replenish the user's health. Then with great speed they rush back into their graves, leaving a summoned soul ghost behind. The summoned soul bows, and it appears as a minion at the users side.
Now I'd like to hear your ideas on some level 68 spells use your imagination and have fun!