Guardian
Immediately after a creature within 5 feet of you takes the Disengage Action or hits a target other than you with an attack, you can make an Opportunity Attack against that creature.
Halt
Halt. When you hit a creature with an Opportunity Attack, the creature's Speed becomes 0 for the rest of the current turn.
Ability Score Increase
Increase your Strength or Dexterity score by 1, to a maximum of 20.
You touch one willing creature. Once before the spell ends, the target can roll a d4 and add the number rolled to one ability check of its choice. It can roll the die before or after making the ability check. The spell then ends.
A creature you touch regains a number of Hit Points equal to 2d8 plus your spellcasting ability modifier.
Using a Higher-Level Spell Slot.
The healing increases by 2d8 for each spell slot level above 1.