Conjure Spectral Mycelium

You conjure nature spirits that appear as a Large pack of spectral bloodthirsty death caps in an unoccupied space you can see within range. The pack lasts for 1 minute and has a speed of 20ft.

Whenever the pack moves within 10 feet of a creature you can see and whenever a creature you can see enters a space within 10 feet of the pack or ends its turn there, you can force that creature to make a Dexterity saving throw. On a failed save, the creature takes 2d10 Slashing damage. A creature makes this save only once per turn.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 3.