Twista Combititus is a spell that allows the caster to create a giant cobra made of blue energy that shields the caster and its companions.
Alternatively, it can be used to enhance the caster's companion's attack(s).
It was first used by Gwendolyn Tennyson to enhance her younger counterpart's attack on Dr. Animo in Ben 10,000.
In The Return, Gwen used this spell on Viktor, the Mummy and the Yenaldooshi. It formed a glowing blue snake that shielded Ben, herself and Max and crashed into the pole behind them.