Earthbound Pillar (Tourmali Tree)

Once per long rest, you can conjure a stone pillar (15 ft. tall, 5 ft. radius) beneath you (only if you are standing on solid ground). When the pillar is conjured, all creatures (with the exception of yourself) within 5 ft. must succeed a DC 12 Dexterity saving throw or be knocked prone. The pillar has 50 hit points, and an AC of 15. The pillar is destroyed after one hour or when its hit points reach 0.