Part 19 of my Zelda: Oracle of Seasons [Linked] Walkthrough.
Collectibles: 5
1. Armor Ring L-2 (34 of 64 Rings)
2. Steadfast Ring (35 of 64 Rings)
3. Slayer's Ring (36 of 64 Rings)
4. Sign Ring (37 of 64 Rings)
5. Huge Maku Seed
ONOX
Difficulty: 10/10
Items Needed: Master Sword, Roc's Cape, Rod of Seasons
The arena in the first phase is a simple room with no gimmicks. The arena in the second phase in a dungeon based room with no gimmicks.
Onox's Attacks:
1st Phase
Onox's Ball and Chain Smash (7:30)
Onox's Quake (7:34)
Onox's Whirlwind (8:03)
2nd Phase
Onox's Claw Smash (8:59)
Onox's Claw Swipe (9:17)
Onox's Blue Flames (9:41)
Onox's Rapid Fire Orbs (9:50)
Strategy: Once the 1st Phase begins, we attack Onox with Spin Attacks as that is the only thing that hurts him. After enough damage he will begin to use Din as a shield, we must use the Rod of Seasons to knock her away and quickly get in a few Spin Attacks before she returns and repeat the process.
In the 2nd Phase, we wait for Onox to try and smash his claw down on top of us, and use the Roc's Cape to jump on his claw. Once he raises his claw up, we jump off and slash the crystal on his forehead to damage him. We can use the Red Ring to double our damage, and use Spin Attacks to further increase the damage until he is defeated.