C Common Morphtronic Bind X TRAP Continuous While you control a face-up "Morphtronic" monster, all Level 4 or higher monsters your opponent controls cannot declare an attack or change their battle positions
Curses can do quite a bit of work in Commander, both politically and in terms of accruing value or securing a win
If you have enough triggers from lifegain, Amalia grows and filters your draws
Golgari (black/green) is one of the best color combinations for removal and ensuring a creature dies, so triggering the morbid ability is rather easy
But when it happens, well let you know
Its ability is perhaps a bit restricted in standard games of MTG, but with it being useful for Aura cards that each have a different name to other Auras you control, its perfect when Commander rules dictate that each card in a deck only has a single copy anyway