delerius seeker stones

at risk of contamination, you touch 3 stones and imbue them with the power of delerium and hurl them at one or several targets within range. make a ranged spell attack for each stone, on a hit the target takes 2d8 + your spellcasting modifier force damage, each target must succeed on a constitution saving throw vs your spell save DC per stone that hits them or gain a level of contamination, targets with levels of contamination have disadvantage on the saving throws

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you create one additional stone for each slot level above 2nd.

the caster must aslo succeed on a constitution save vs their spell save DC or gain a level of contamination, casters with levels of contamination have disadvantage on the saving throw