Time ripple

You briefly stop the flow of time for everyone but yourself. No time passes for other creatures, while you take one extra turn after this one. During which you can use actions and move as normal.

While the spell is active, all attacks automatically hit. When the turn ends, time catches up to you. You take 3 points of force damage for every 5ft of movement and for every melee attack you make on the extra turn. 

you can cast this spell at higher levels, adding an extra turn, but doubling the damage taken on each consecutive turn.