Circle of Doom

The player casts Circle of Doom by drawing a 10-foot circle around them and their peers using white chalk. The player then sprinkles some stardust into his/her hand and blows it onto the circle. The circle then glows a faint yellow. When these steps are completed, any creature who is not within the circle has to roll a wisdom save of 14 or higher. If that creature fails that wisdom save, it is knocked prone until the next round.

If the player who cast Circle of Doom loses concentration the circle disappears and they lose 2 hit points. Every turn the caster of Circle of Doom must make a concentration roll of 14 or higher or lose concentration.