Move: 10' to the swarm (so that between him and the swarm is 1 5' square)
If possible, he will stand close to one or more other ally (-ies) so he can use protection reaction
Attack (or ready an attack):
Ordrar attack; damage: 1D20+10 = [14]+10 = 24
1D8+5 = [2]+5 = 7
1D20+10 = [5]+10 = 15
1D8+5 = [6]+5 = 11
- this is full attack if someone is available outside of the swarm, otherwise ready action
Feel free to roll if there is advantage and note:
with advantage on a melee attack roll you make with the weapon and hit, you can knock the target prone if the lower of the two d20 rolls would also hit the target.
with disadvantage on a melee attack roll you make with the weapon, the target takes bludgeoning damage equal to your Strength modifier (minimum of 0) if the attack misses but if the higher of the two d20 rolls would have hit.