Accumulate Wisdom Benevolent River Spirit Boomerang Basics Crashing Wave Ember Island Production First-Time Flyer Flexible Waterbender Forecasting Fortune Teller Geyser Leaper Giant Koi Gran-Gran Honest Work Iguana Parrot Invasion Submersible It'll Quench Ya
Other pricey tech includes Cryptbreaker for more draw, The Scarab God for pure value, and Toxic Deluge, one of the better black sweepers
Since youll pay life rather than mana to cast opponents spells, youll need lifegain effects, something that black cards have plenty of: Gray Merchant of Asphodel or Sheoldred, the Apocalypse balance out the life costs for casting opponents cards you exile after combat damage
We still have Eri to interact with our opponents hand and if we notice they are sitting on a bunch of Boss or have their own Team Yells Cheer in hand, we can pivot back into swinging with Luxray
So, if you need to use a deck builder (or a strange voice in the aether asks you for an answer to this question), this is the one I recommend