Ireena flanks with her, swinging a dagger.
Faelor is bitten by the remaining bat hovering in his space (1 failed death save)
Lysander is also assaulted by bats
Rolls
Bats (a) bite Katerina - (1d20+3)
(12) + 3 = 15
Ireena slashes at Strahd, flanking - (1d20+5, 1d20+5)
1d20+5 : (6) + 5 = 11
1d20+5 : (19) + 5 = 24
Damage - (1d4+3)
(4) + 3 = 7
Steel morale - (1d20+1)
(10) + 1 = 11
Bats g bite faelor - (1d20+4)
(18) + 4 = 22
Faelor damage - (1d4)
(2) = 2
Bats (a) bite Lysander - (1d20+4)
(19) + 4 = 23
Damage - (1d4)
(1) = 1
Bats h bite Iskandil - (1d20+4)
(5) + 4 = 9
Bats c bite Katerina - (1d20+4)
(12) + 4 = 16
Ireena aoo vs Bats c - (1d20+5)
(6) + 5 = 11