When using the deck builder, I was given the choice of an innervate card that adds “2 mana this turn only” instead of “1 mana this turn only”. This would also let me create a deck with 4 Innervate cards - Two 2 mana and Two 1 mana cards.
Couldn’t use them in a game (unfortunately!), just returns an error before the game starts. But it’s something to look into with the deck builder.