Delta will then stride into the square next to both south skeletons, and then slam twice!
First slam Bludgeoning: 1d20 + 6 ⇒ (13) + 6 = 191d8 + 7 ⇒ (1) + 7 = 8
Second slam Bludgeoning: 1d20 + 1 ⇒ (8) + 1 = 91d8 + 7 ⇒ (3) + 7 = 10
Will attack the first skeleton twice if not dead after the first hit, or the other skeleton if it is