Be careful riot,
this rune is dangerously unbalanced rn,
on some champion combo (adc + 
)
it will be broken AF,
whereas on other more intended for that (
)
it will be an OkAy rune.
i think , this rune has the potential to be a great keystone,
so we avoid adc + shieldbash,
or they decided to play a defensive shit.
it's too hard to balance as a minor rune.
ow and i think the champion you should balance this around is 
;)
PhearBunny2 votesDraven+Janna. Overheal+Shieldbash. Blood Thirster.
RookPusher2 votesSchrodinger's Rune
Killer of Night91 votesGoing determination on adc isn't a good decision. Sorcery and domination reward better damage source. If an adc goes for determination, is all because of the defense that this tree offer (so picking a dmg rune isn't worth. Also rely too much on support since adc shield are usually build overtime (overheal or BT) so it would goes quickly off. This rune became op with more defense (hard to break shield) and high hp amount (sion basically). Other case it's not that strong.
Camille OTP3 votesNOPE, i'm not talking about a single thing, you missed 3 information : 1-Determination can be a secondary tree, 2-Riot is planning on changing stat functionning , if you pick determination, you will not be forced to have hp as secondary stats 3-the adc is not the one willing to create the shield. meaning, JANNA FULL AP + ADC.
Read it carefully and you'll see : WHEN YOU GAIN A SHIELD
any shield works.
if you don't think i'm right, imagine this : janna with NO ap 240*0.085 = 20 damages +39 = 59 damages just because rune on a shield
now 1000 AP JANNA: 940*0.085+39 = 119 damages BURST. (for comparison DUSKBLADE is 75+lethality damages burst. and 44 lethality is A LOT)
with
she has around 250 ap + 250 shield due to unholy grail.
even with that she gives a 665 shield which represent a 95.525 damages burst on each SHIELD gain +64 ad on adc.
i'm sorry , that champion become a living duskblade.
i did not even talk about karma or lulu that also have a shield or rakan.
If you want to do shield damage , you should not be able to o that on secondary tree, it deserve to be a keyston , so champion who PICK it are not willing to use it with MORE burst on auto attack or something.
Killer of Night91 votesFirst, I always mean determination as secondary tree since I mention sorcery and domination is better in any way (precision should be the first one). Second in which scenario janna would get that amount of item and ap? It would be only true late game where adc has alredy reach high amount of gathering storm Ad (so getting determination instead of sorcery is counterproductive since Ad is more useful (eg scale with crit,true damage,lifesteal,ability dmg). Also the shield could be break so the damage would get lower while ad provide by eyeball collection or gathering storm wouldn't go down). Oh and you calculated that janna has no ap at lv 9 where she put 5 point in her shield which mean that's 20 dmg mitigate via armor. 119 dmg at 1000 ap are also mitigate by armor and as I said gathering storm offer literally more dmg since it can crit and also can be converted on true dmg by Infinity edge. All of this are listen about GIFT shield on the adc.
Bears Dont Care1 votes[{quoted}](name=Camille OTP,realm=EUW,application-id=3ErqAdtq,discussion-id=TwO4xiBz,comment-id=00000000,timestamp=2018-10-25T14:59:02.954+0000)
NOPE, i'm not talking about a single thing, you missed 3 information : 1-Determination can be a secondary tree, 2-Riot is planning on changing stat functionning , if you pick determination, you will not be forced to have hp as secondary stats 3-the adc is not the one willing to create the shield. meaning, JANNA FULL AP + ADC.
Your situation is unrealistic, and the damage is adaptive so it remajns affecyed by armor anyway.
Alzon1 votesThe rune literally does not work on Mordekaiser, or so I’ve heard.
The Anivia OTP1 votesi just realised someone stole my post :(