Mairsil, the Pretender is admittedly a pet card of mine and the closest thing to a combo deck that fits my tastes
Most of the mass effects that sweep more than creatures cost at least six mana, so you get a nice bonus
Super-Skrull The rates Super-Skrull charges for its results are on the high side, but they are worth full cards on their own and you always want access to them
This could also include 1 of the 37 extended-art rares (29.6%) or 9 extended-art mythic rares (3.6%)
Finally, if things start going really bad, just pull a Kefka and destroy the world using Ruinous Ultimatum. This card is incredibly high-cost but allows you to destroy all non-land permanents all your opponents control
The biggest downside here has to be the 4-mana MV, so youll need to find a way to get the mana on time for this red creature to be effective