Earthen spike

Summon two earthen spikes. These spikes can be made of stone, metal, soil, clay, wood, and shrubs. This spell deals 2d8 piercing+ 1d6 force damage at first level. This spell also makes the player roll 1d20. If the player rolls and beats a DC 15 , you inflict stun on the target for 2 rounds. If they beat the DC 15 5 times in a row, they always inflict stun. If the player rolls a natural 20, you also give your allies 1d4 extra on any kind of roll of your choosing.