So, the Mask is a combo with a lot of cheap creatures that have ETB restrictions, like Phyrexian Dreadnought or Lord of Tresserhorn
Before I walk you through exactly how to conduct a trade, however, there's some quick rules I want to cover
O-Naginata (2XM foil 50, SOK foil $5) I wish there was a sweet version of this to go after, but again, adding three power is where both legends are happiest and this time it is as cheap as can be, no need for ways to cheat the equip cost
Return to the Ranks isn't a core part of the combo, but it is very useful to have in your deck
I think the best way to use this is to cast something with Bargain after Chapter II, that way you permanently rid yourself of an opposing creature