The Legend of Zelda: Oracle of Ages/Black Tower

Before the next quest
Visit the Zora village during Zelda's age and lift all the coffins in the crypt. One of them conceals a chest with a Blue Luck ring.

Dungeon
At the entrance of the Black Tower, Ralph rushes to kill Queen Ambi possessed by Veran in order to save Labrynna. Impa reveals that Ralph is a descendant of Ambi; then, Impa and the others reach a nonsensical conclusion.

On the contrary, the fact that Ralph is a descendant of Queen Ambi means that nobody killed her, and Ralph's attempt is doomed to failure. The birth of Ralph is proof that Queen Ambi was saved; it is 100% certain that Ralph will be unable to kill Ambi, but what about the opposite? Will Ralph survive?

Mini-boss: Ambi-Veran
Ambi mocks Ralph pressing on his limited intelligence: "if you kill Ambi, you will disappear". Actually, impossible that Ambi gets killed, because 400 years later Ralph was actually born! Therefore, it is obvious that Ambi will survive Ralph's attack.

Boss: Veran
?