Szass Tam's Squeeze

You grasp your hand and the target feels the squeeze! If you can see a target, it must make a Strength saving throw or take 1d4 force damage. If you roll a 4 one or more of the damage dice, reroll and add that to the total. If the target fails by 5 or more, roll an additional 1d4 damage with the same rules. 

This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).