Elemental uprooting

You pull a large tree shaped object from the elemental planes (it is immune to all damage). The tree appears in an unoccupied space within range on each of your turns you can use a bonus action to cause the tree to do one of the following effects (20ft radius). 

Fire fall: the leaves turn to fire and descend from the tree. any creature in the area must make a dexterity saving throw or take 3d10 fire damage on a fail or half on a successes.

Rock fall: the fruit on the tree turns to stone and plummets to the ground. Each creature must make a strength saving throw or takes 3d10 bludgeoning damage on a fail or half on a success.

Lightning strike: the branches turn into lightning and strikes the ground. each creature must make a constitution saving throw or take 3d10 lightning damage on a fail or half on a successes. 

Crawling cold: frost crawls from the underground roots to the surface. Each creature touching the ground must make a constitution saving throw or take 3d10 cold damage on a fail or half that on a success

At higher levels: the damage increases by 1d10 for each slot above 4th.