First printed in Shards of Alara, cascade allows players to cast free spells whenever they cast a spell with cascade on it
Andy, Lenny, and Bert
Normally you wouldn't want to exert a shift target before playing a Floodborn on top of them, but in this case, Determined Defender is a Bodyguard, so it's actually advantageous for him to come out exerted
Ancestral Recall Balance Black Lotus Chaos Orb Channel Emrakul, the Aeons Torn Erayo, Soratami Ascendant Falling Star Fastbond Flash Golos, Tireless Pilgrim Griselbrand Hullbreacher Iona, Shield of Emeria Jeweled Lotus Karakas Leovold, Emissary of Trest Library of Alexandria Limited Resources Lutri, the Spellchaser Mana Crypt Mox Emerald Mox Jet Mox Pearl Mox Ruby Mox Sapphire Nadu, Winged Wisdom Paradox Engine Primeval Titan Prophet of Kruphix Recurring Nightmare Rofellos, Llanowar Emissary Shahrazad Sundering Titan Sylvan Primordial Time Vault Time Walk Tinker Tolarian Academy Trade Secrets Upheaval Yawgmoth's Bargain As always, your playgroup can rule 0 to unban any of the cards in this list
They can be particularly powerful with counterspells, which I imagine is the pair here, because treasures allow you to tap out while still holding up a counter
Rootwater Hunter wasn't as important as the wall, but would make your deck every time none-the-less
