Eldritch Grip

Your hand glows with eldritch energy as you deliver a blast to a creature you try to touch. Make a melee spell attack against the target. On a hit, the target takes 2d10 force damage, and you attempt to grapple it, you gain a +1 to your strength check for this grapple and to each subsequent check to maintain the grapple. Whilst the target remains grappled you can use a bonus action to deal 2d10 force damage to it, if you do not maintain the spell, the spell ends and, the target automatically succeeds its next attempt to escape the grapple. 

 At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, you deal an extra 1d10 force damage for each level above 1st. The strength check bonus increases by 1 at 3rd (+2), 5th (+3), 7th (+4) and 9th (+5).