His scimitar swipe misses Osvaldo, but just barely. Meanwhile the two goblins ganging up on Severus both hack at the barbarian, and one Goblin's nasty blade digs deep into Severus's shoulder.
Turn order is as follows:
1. Severus
2. Osvaldo
3. Goblins
-->4. Bug
Rolls
Goblin 2 Attack (Osvaldo), Scimitar Damage - (1d20+4, 1d6+2)
1d20+4 : (11) + 4 = 15
1d6+2 : (3) + 2 = 5
Goblin 3 Attack (Severus), Scimitar Damage - (1d20+4, 1d6+2)
1d20+4 : (14) + 4 = 18
1d6+2 : (1) + 2 = 3
Goblin 4 Attack (Severus), Scimitar Damage - (1d20+4, 1d6+2)
1d20+4 : (3) + 4 = 7
1d6+2 : (5) + 2 = 7