Toil is garbed in a ragged, once-regal purple cloak over a drab double-breasted lab coat. He carries a mechanical "skull" in his left hand, dangling from his hand by its "hair" (several thin and long chains). In his right, he holds a metal sceptre visually resembling a spine (though this is merely decorative - it is not flexible). His own hair is styled as a faux-hawk.
Toil begins with 1 rank in his ultimate ability, and can rank it up 3 additional times, once each at 6, 11, and 16. Note that Toil has multiple means of creating Skulls, but primarily creates Skulls via Living Metal.
Skulls have health equal to Toil's maximum Skulls, and take a maximum of 1 damage from any source. This includes that they will only take 1 total damage from any periodic effect, such as Torment or Null Zone, though obviously a champion can damage them multiple times. Skulls stay fairly close to Toil, though the most recently gained stays the farthest. They follow in a zig-zag dance as he walks and orbit him in a spiral while he is still.
Skulls do not block skillshots, nor are they targetted by minions, monsters, or towers. (Whether they take damage from single-target skillshots as they pass through is undefined, though preferred. This depends upon the difficulty of coding.)
Not a huge fan of the passive. Doesn't really feel consistent with the concept... Potentially neither does Scorched Earth, to be honest. It's like you have these two all-in abilities on a character that really likes to fire mid-range artillery at people and keep his Skulls safe.
Character might use the Skull mechanic too much, actually. Like, it's cool when it's a significant part of the character, but...
The silence-after-slow thing on Burden Mind is a bit weird. Should reconsider that.
It's like Swain + Syndra had a baby.
I do like how you can have "pet casters" that copy your spells (see Wreckspine). Maybe this mechanic should be reworked into a Mesmer-like character that gains sigils as s/he casts spells, and all of hir abilities are copied, not just Wreckspine. Better focus on pets. Hm.
I think Cycle of Life shouldn't itself stun - it should instead apply a status effect that a hit by Wreckspine can activate in the next 3 seconds, which then stuns - like Xerath's Arcanopulse after Mage Chains.
Not sure silence on Burden Mind makes a lot of sense for the character. Like, he's heady, but not necessarily silence...y.