Genju of the Falls

The whole appeal of the Genju cycle was hiding a threat inside a permanent every deck already runs, so the body costs no card in play even though the Aura itself still eats a noncreature slot in the deck. This blue member turns an Island into a 3/2 flier for two mana, and the flying matters more than the size, since it climbs over the ground stalls that grindy blue decks tend to settle into. The clever piece is the recursion clause: sweep the board or trade the animated Island in combat, and when that land dies the Aura comes back, set to reattach the following turn. Creature removal and board wipes only buy a turn against it, since they answer the temporary creature rather than the card; the durable answer is enchantment removal, which most opponents aren't holding up. That resilience is the real design idea: a slow clock you can rebuild over and over while leaving your hand open for countermagic between activations. The friction is paying two every turn you want to attack, and the genuine vulnerability is that an opponent can bounce or destroy the enchanted Island in response to the activation, so the ability finds no Island to affect and your mana is wasted. It is a patient win condition, but a self-replacing one, and that durability is exactly what the cycle was reaching for.