Arboreal Metamorphosis
Tier 1 Epic transmutation
Casting Time: 1 action
Range: 120 feet
Components: V, S, M (a nut from an extinct species of tree)
Duration: 1 minute
You attempt to transform one creature that you can see within range into a wooden form that functions like a living tree. If the target’s body is made of solid matter, the creature must attempt a Constitution saving throw. On a failure it is restrained as its body begins to harden. On a success the creature isn’t affected and the spell ends.
A creature affected by this spell must attempt another Constitution saving throw at the end of each of its turns until the spell ends. If it successfully saves against this spell three times, the spell ends. If it fails its saving throw three times the spell ends and the creature is turned to wood and subjected to the petrified condition permanently. The successes and failures don’t need to be consecutive; keep track of both until the spell ends.
In the creature’s new form, its body functions like a living tree of a type chosen by you, growing superficial foliage and other appropriate characteristics. If the creature is physically broken while petrified, it suffers from similar deformities if its reverts to its original state.
At Higher Levels. When you cast this spell as a tier 2 Epic spell a creature need only fail a single additional saving throw over the spell’s duration after it fails the initial saving throw to become petrified. When you cast this spell as a tier 3 Epic spell, a creature that fails the initial saving throw against this spell becomes immediately petrified
Ref: ELCR p90