Time door

You hold the material component in your hand. The material then lights on fire shooting sparks in every direction. You can throw the marital at one creature to send them 1d12 hours forward or backwoods in time. You can also draw a door in the sky to create a doorway 1d12 creatures may enter. This hallway has infinite doors, each door has numbers starting at zero going backwards into negatives and forward into positives. When you enter a door you go a chosen amount of time backwards or forward depending on your number being negative or positive. This doorway stays open for 1d4 days. Going too far forward or backwards more than 30 units wil revel a random CR 8-20 monster depending on a 1d12 roll. Chosen by the DM