Valki, God of Lies is a two-mana god, but it's not the thing that made sure cascade had to change
At the beginning of combat on your turn, another target creature you control gains Haste and gets +X/+X until end of turn, where X is that creatures power
This card, whose ability Vanessas Design enables players to force an opponent to discard a non-character card whenever they quest, has the potential to be very easy to play if put into a deck containing plenty of song cards
Luckily, there are some really cool art treatments, one of my favorites being the trainer gallery cards
Unsurprisingly, Mox Opal and its siblings are banned in most formats
Of course, you still need two Undying creatures and some other payoff like Blood Artist to pull it off, but being able to recur Yawgmoth from your graveyard in the form of the Soul Cauldron is quite powerful