Dredge is one of the most powerful decks in Modern, even without Golgari Grave-Troll
I recently got back into playing Magic after about 15 years, and Im happy that my current more-mathematically minded brain is finding many ways of analysing the game (so expect more posts on this in the near future)
is a reference to For Mirrodin!, Rouse is a hybriding of Flashback and Embalm, Sabotage was built out of Ninjutsu, Supply was a variant of Monstrous, and Intercept was modelled on Champion
Good news, too: Exiling this Spidey from the graveyard allows you to put it back in the command zone, so you get the full range of abilities here
The ability to recast Demilich from the graveyard encourages a resilient gameplan, and the ability to re-cast spells from your graveyard when it attacks