msem-instigator

When you cast your third noncreature spell each turn, transform Aspiring Rascals.

({T}: Add {W} or {B}.)
As Blessed Mausoleum enters the battlefield, you may pay {1}. If you don't, Blessed Mausoleum enters the battlefield tapped.

({T}: Add {R} or {G}.)
As Dangerous Territory enters the battlefield, you may pay {1}. If you don't, Dangerous Territory enters the battlefield tapped.

({T}: Add {B} or {G}.)
As Eerie Bayou enters the battlefield, you may pay {1}. If you don't, Eerie Bayou enters the battlefield tapped.

({T}: Add {U} or {B}.)
As Forlorn Ruin enters the battlefield, you may pay {1}. If you don't, Forlorn Ruin enters the battlefield tapped.

({T}: Add {W} or {U}.)
As Lakeside Park enters the battlefield, you may pay {1}. If you don't, Lakeside Park enters the battlefield tapped.

Whenever Marshback Knights becomes the target of a spell or ability an opponent controls, counter it unless they pay {3}.
{1}{U}: Marshback Knights gains flying until end of turn.

({T}: Add {G} or {U}.)
As Mushroom Lagoon enters the battlefield, you may pay {1}. If you don't, Mushroom Lagoon enters the battlefield tapped.

({T}: Add {R} or {W}.)
As Prayer Hall enters the battlefield, you may pay {1}. If you don't, Prayer Hall enters the battlefield tapped.

({T}: Add {U} or {R}.)
As Ritzy Parlor enters the battlefield, you may pay {1}. If you don't, Ritzy Parlor enters the battlefield tapped.

({T}: Add {G} or {W}.)
As Sunlit Plaza enters the battlefield, you may pay {1}. If you don't, Sunlit Plaza enters the battlefield tapped.

({T}: Add {B} or {R}.)
As Vacated Bar enters the battlefield, you may pay {1}. If you don't, Vacated Bar enters the battlefield tapped.

Voidtouched Nightblade can't block.
Simulacrum (When this creature dies, exile it from your graveyard. If you do, create a token that is a copy of it except it is a colorless 1/1 Crystal Elf Rogue artifact creature.)