There are five rarity sets for the random rings in Oracle Ages/Seasons (four sets of 8 rings and one of 2 rings):
L-1 Magic Rings:
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Cursed Ring
Like Like Ring
Blue Luck Ring
Green Holy Ring
Blue Holy Ring
Red Holy Ring
Octo Ring
Moblin Ring
L-2 Magic Rings:
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Maple's Ring
Toss Ring
Red Luck Ring
Whisp Ring
Zora Ring
Fist Ring
Quicksand Ring
Roc's Ring
L-3: Magic Rings:
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Power Ring L-2
Peace Ring
Heart Ring L-2
Red Joy Ring
Gasha Ring
Peace Ring
Whimsical Ring
Protection Ring
L-4 Magic Rings:
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Expert's Ring
Charge Ring
First Gen Ring
Bomb Proof Ring
Energy Ring (2x)
Dbl. Edge Ring (2x)
L-5 Magic Rings:
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Green Ring
Rang Ring L-2
The ring levels also correspond to other events, not just growing trees.
-Treasure Chest Game:
4x Correct Guess = random Ring L-1
5x Correct Guess = random Ring L-2
6x Correct Guess = random Ring L-3
-GBA Shop (only one for sale):
random Ring L-3
-Maple:
random Ring L-1, L-2(?)
-Fortune Linkage:
Haven't tested this so far
-Gasha Seeds can drop 10 different types of prices:
1. PoH: only once, if you already got it you get a L-4 ring instead
2. Random Magic Ring L-1
3. Random Magic Ring L-2
4. Random Magic Ring L-3
5. Random Magic Ring L-4
6. Random Magic Ring L-5
7. Potion
8. 200 Rupees
9. Fairy
10. 5 Hearts
-The chance of getting a particular reward from the tree depends on in which soil location you plant it. There's namely five different levels of soil patches of increasing goodness:
Reward\Patch L-5 L-4 L-3 L-2 L-1-------------------------------------------------Piece of Heart 35.2% 10.2% 0.0% 0.0% 0.0%Ring L-5 10.2% 0.0% 0.0% 0.0% 0.0%Ring L-4 25.0% 14.8% 0.0% 0.0% 0.0%Ring L-3 14.8% 35.2% 14.8% 0.0% 0.0%Ring L-2 0.0% 19.8% 30.1% 35.2% 25.0%Ring L-1 0.0% 0.0% 39.8% 35.2% 20.3%Potion 5.1% 9.8% 5.1% 10.3% 14.8%200 Rupees 5.1% 5.1% 5.1% 10.3% 14.8%Fairy 4.7% 5.1% 5.1% 4.7% 14.8%5 Hearts 0.0% 0.0% 0.0% 4.7% 10.3%-------------------------------------------------Total 100.0% 100.0% 100.0% 100.0% 100.0%
-I haven't been able to link all patch to the actual locations in both games, but I do know there are:
2x L-1 Soil Patch
2x L-2 Soil Patch
4x L-3 Soil Patch
6x L-4 Soil Patch
2x L-5 Soil Patch
Which adds up to a total of 16 patches completing the set. Naturally, the higher leveled patches are located deeper into the game and thus farther away from Holodrum/Labrynna in particular.
-The very first Gasha Seed you cut always contains a L-1 Ring. It appears Nintendo wants to show the user that Rings can be obtained from a Gasha Seed.
-The growth of the trees works indeed like you mentioned. You get 1 point for each enemy killed (two with Gasha Ring) and when the counter hits 40 the Tree matures.
-There's a single global counter which increments on certain events. This counter is used to determine the category of Nut's contents (1 to 10). I've noticed that you recieve points for:
5 Points - Walking from one screen to another (except when entering/leaving residences)
1 Point - Dig with the shovel in some soft soil (won't work if there's nothing to dig)
4 Points - Pick up a Recovery heart
24 Points - Pick up a Fairy
64 Points - Get healed by a Great Fairy
64 Points - Get a Heart Container
3 Points - Kill an enemy (regardless whether it is an wimpy Octorok or Blue Lynel)
0 Points - Kill a (Mini)-boss; you get nothing for those
50 Points - Finding secrets such as covered Soil Patches
150 Points - Collect an Essence of Time/Nature
Oddly, there are no events which can cause the global counter to subtract points from your total. Although, I still need to figure out how this counter influences the "goodness" of a nut's content.