Ttharg Krixkrux

As the creatures emerge and begin bearing down on the party, Ttharg charges up to the Blue Slaad and swings his Warhammer at it.

With a sharp click of his tongue, the Spiritual Weapon also moves in and swings against it.

Spoiler
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Move up to the Blue Slaad.
Main Action Attack with Warhammer. (Not sure if I would be getting Advantage for Flanking with the Bullywug, so I rolled twice, but first roll was better.) 17 to hit for 4 Bludgeoning Damage.
Bonus Action to direct Spiritual Weapon up to the Blue Slaad and attack. 24 to hit for 7 Force Damage.