Hela Jebait

The idea is to use Invisible Woman to delay all random discards (of even Lady Sif, if necessary) until the end of the game, immediately before Hela triggers if she's at the same location. Wong then Hell Cow then Hela, all hidden, fills the other two locations with huge characters. If you don't draw Hell Cow and/or Wong there's additional discard options to fill as much of the board as possible.

This deck only works about half the time because it needs Invisible Woman and Hela to do anything. But it can look extremely weak when it's strong, so there's lots of Snap potential.

Cloak is anti-Cosmo technology. But there's little that can be done about Enchantress.