Rod

Very Rare

Once per day, use an action to place the key in a vegetation mound or tree to summon a Shambling Mound. It is friendly to you and your allies and obeys your commands. It will defend itself but take no other action unless commanded. It will obey your commands to the best of its ability.   You can use an action to enter (or exit) a summoned Shambling Mound. While inside you cannot be damaged until the Mound is destroyed. Movement and attacks are taken as the Mound. When the Shambling Mound is destroyed, the key is left behind.

This foot-long iron rod is adorned with leaves which seem to grow from the surface of the iron.