Additional costs dont affect a spells converted mana cost
Additionally, Kadena lets you draw a card the first time you play a face-down creature each turn, meaning Kadena doesn't just reduce mana costs, but can offer card advantage as well
Instant Ramen I mean, come on, you know we had to do it
I know it would be quite mana intensive, but picture this: You discard ChameleonChameleon, you copy it, thanks to HashatonHashaton's ability and you later cast the original ChameleonChameleon from your graveyard for its mayhem cost
#6 Toxtricity Toxtricity is vital to the Dark type Pokemon decks that have been getting a solid buff in recent sets, enabling you to not only search out dar energies from your deck but then attach them to your benched dark type Pokemon