U/G modern troll
Run Hedron crab (playset)
Run both instant copy spells, cackling counterpart and that other one that was in (Return to Ravinica?) set.
Run crap ton of fog variations (Regular fog, fog that populates, werewolf fog, think there are some more than just those three but that is 12 possibilities of fogging, adjust as see fit for main/side)
Run few low drop counters just in case they try to kill or exile hedron crab army
Run two or three(won't really need playset) Progenitor Mimic (and/or other clone creature spells.No, seriously, Progenitor Mimic a Hedron crab is the funniest damn thing you can do in MTG)
(For extra trollage make sure you have dual lands for white for splash in side board of instants to make creatures/permanents indestructible in case they play uncounterable supreme verdict on poor Hedron crabs)
Create army of Hedron crabs
Mill opponent out
Watch em flip table
Forever be hated in magic for being that guy/girl
Other side to consider, things that may exile their graveyard in case they try to troll your milling with some stupid Emarakul or other big three Eldrazi(think all three legendary of Eldrazi did that reshuffling BS)
Things to note, if you don't get a Hedron crab out, chances are you may lose game, mulligan till you have at least 1 in your hand.
Try to hold onto Hedron crab till you have way to protect it
Remember 1 Hedron crab makes them mill 3 every land fall. More crabs, more multiples of three hitting, more mill. If you mimic it, you might as well say GG(assuming they haven't already deck out by the time you hit that mana curve I suppose you could run methods to play more land with green spells or drop more than one land/fetch, but may mess with other trolling.)
Statistically it works, 33% of the time.