Not only does it let you Special Summon Frog Monsters from the deck, it can also negate a Spell, Trap, or Monster effect for the relatively low cost of one Aqua Monster including one in your hand
Reality Heist #75 Kamigawa: Neon Dynasty Change Version Reality Heist Instant This spell costs less to cast for each artifact you control
Thunder Dragon can immediately be a light monster in the graveyard (note: you can activate Thunder Dragons effect even if you have no copies left in the deck), and the deck plays a swath of dark flip effect monsters to dig through the deck and fill the graveyard
This time around, there's an Amber/Amethyst deck and a Ruby/Steel deck
All three have strong designs that feel like they could support their own decks with interesting mechanics and are only improved with partner
Card Name Mana Cost Type Creature Elf Druid Rarity Uncommon rules Text When this creature enters, you get an amount of (energy counters) equal to the greatest power among creatures you control.Pay : Target creature blocks this turn if able