Magik users are prone to random weakening or empowering, as the universal "web" of magik rotates around the center of the universe and a particular area fluctuates in concentration of power.
Magician casts Fireball.
Magik user creates shield of energy.
Magician freezes the air around magik user.
Magik user teleports behind magician.
The power of magik fluctuates, magik user weakens considerably.
Magician casts lightning bolt.
Magik user slightly diverts the charge, but is shocked.
The power of magik flucutates, to great concentration on the battlefield.
Magik user summons army of demons.
Magician is occupied fighting them off.
Magik user levitates off the ground, and creates an earthquake which splits the ground.
Magician falls into huge crevasse, crack in ground closes.
Magik user wins.