Toxic spikes

You toss tipped spikes around you. 5 spikes land on 5 random squares within 30 feet of you. Any creature that steps on one of these spikes instantly takes 1d8 piercing damage and 4d4 poison damage and must make a Constitution saving throw. A creature who fails this save has its speed reduced to 0 for the rest of its turn and gains the poisoned condition for one minute.