The conjurer's cone

You conjure a shimmering, cone-shaped portal centered on yourself. To activate this spell, you must possess a Sling Ring. As you concentrate, maintaining a focused mental state, you silently recite an inner incantation or mantra, which is an integral part of channeling the spell's magic. Simultaneously, your left hand moves in a clockwise motion (while having the sling ring on it), tracing the arcane pattern required to complete the casting. This combination of somatic and mental components allows you to control and sustain the conjured cone for up to 20 seconds. The portal can transport you and others within a 300-foot radius from your current location. Concentration is required to keep the spell active during this time.