You cause a Tiny white flower to sprout at a point on the ground you can see within range. The flower has an AC of 15, 1 hit point, vulnerability to fire damage, and immunity to cold damage. During the spell’s duration, you can use a bonus action to command it to explode in a shower of ice. Alternatively, the flower will explode if it is reduced to 0 hit points. When the flower explodes, each creature within 30 feet of it must make a Dexterity saving throw. On a failed save, a creature takes 10d8 cold damage, or half as much on a successful one. The flower withers and dies if it doesn’t explode within 24 hours. If you cast this spell again while it is active, you can maintain the flower’s existence for another 24 hours. You can create a permanent flower by casting this spell on the same flower for seven days.