Thunderwave

Everyone in 15 Ft cube from you, Dex save.
Failed: 2d8 Thunder damage, pushed 10Ft.
Success: Half damage, not pushed.
Loose opbjects always pushed, 300ft boom.
At higher level
When you cast this spell using a spell slot of
2nd level or higher, the damage increases by
1d8 for each slot level above 1st.