I'm not sure if this is a problem linked to Syndra making it able for a enemy to kill their own teammate, or Rammus. I launched Syndra's E into the entire enemy team along with 3 Dark Spheres. This resulted in Rammus killing Jax. http://imgur.com/FkHCQig
Kar98k58 votesRammus forgot to turn Friendly Fire off.
DrCyanide31 votesI've heard DOTA has a Denial mechanic, where you kill friendly units to keep the enemy from getting the gold. Rammus is just taking it to the next level.
DREADN0UGHT3 votesIn Dota, you can execute your own minions when they are about to die, to deny the enemy laner any form of gold or exp.
MEMEME6704 votesYou can deny your own anything actually, and it only denies half the exp iirc.
You can deny towers, and even allied Heroes! (Or yourself, if you have a move that damages yourself ala Pudge.)
Smithney1 votesI thought you can only deny allies by specific abilities (think Oracle), but I could be wrong.
Faceroll Tactics1 votesFrom what I remember, Oracle never had a deny ability, but no one in my MMR ever played him.
A way to deny allies is say Kunkkha ultimate, where it has a mini deaths dance effect on anyone hit, the damage taken the few seconds after gives the kill credit to Kunkkha if it is fatal
Smithney2 votesThanks for the info. If there is one thing I really liked about DotA it was the deny mechanic. I would've loved to play the game more, but I just couldn't fully enjoy it with my shitty micro...
DREADN0UGHT1 votesI think you are right about the half exp part.
But I don't recall being able to deny towers doe. who the fuck would do that anyway.
blueberrypancake1 votesI guess if the opponent is pushing and you don't want them to get the gold But I dunno
Canidae5 votesit's a mechanic in Dota and players do this to halve the global gold that the enemy team receives when a tower goes down. It's not like u can use it to throw or anything; ur only allowed to attack ur own tower once its hp falls below 10%
DREADN0UGHT1 voteswow that is weird I never knew that. Then again, I played very little DotA before jumping to LoL.
Faceroll Tactics1 votesYou can actually deny your own teammates if
They have under 5% hp They are currently under a damage over time effect The damage over time is going to kill them
So poor Viper has a hard time in high elo games
Arakadia1 votesWhy? Whats viper's deal.
Faceroll Tactics1 votesPoison on every auto, ult is a super lethal poison.
very skilled players can just whack vipers target in fights and viper gets no gold from the kill
Atanchan1 votesTowers need to be at 25% health to be attacked by a friendly unit, while most things just requires 50%.
The only other exception is with ally heroes. I forget if there's a health threshold, but no matter how low they are you can't attack them ( and therefore try to go for the deny ) unless they have specific debuffs on them - usually, extremely long or powerful DoTs.
Plus anyone can deny themselves to neutrals. You won't give anyone the kill if you die to a jungle camp, even if they damaged you literally half a second ago.
Also worth noting is that a hero, Lich, has a spell that's flat-out creep denial while giving the experience to his team. You pretty much pick him if you ever want to give a specific lead a signficant exp advantage, since you're flat-out removing one creep of experience for your opponent and splitting it between you and the laner.
Terchio1 votesI thought you could deny heroes with skills like Pudge, or if they were taking poison damage that would kill them anyway. That might have been patched out long ago, though.
kaltenashes1 votesold old old old old old... more old old old (if i remember correctly was on Season 1 )
E was something like: kill an allied minion to boost you and your ally champs, but then rito removed denial from lol but tryndamere's ult is still the same as far as i know (some changes on pbe but its the same)
TheDelighted21 votesSpaghetti code used friendly fire. It's super effective! Jax fainted.
General Esdeath 14 votes[
sweating nervously]
TheLastShadow4511 votesIt's because of syndra E
TwinTon38 votesIt's the E.
"Knocks enemies and Dark Spheres back dealing 70/115/160/205/250 (+40% Ability Power) magic damage to them and any enemies they collide with"
From my understanding, Rammus got hit by the E. Collided into Jax. Because Rammus was in the effects of Scatter the Weak, he caused damage to Jax.
DREADN0UGHT3 votessounds like a coding error.
a rabid cupcake10 votesAll I can imagine is Syndra shoving Rammus and Jax getting impaled on Rammus's spikes.
The Deckowner1 voteswhy doesnt lee sin kick do the same
Time428 votesYeah looks like Syndra's the problem, I'm sure someone posted a video with something similar on the EUW boards..
Edit: https://www.youtube.com/watch?v=7LN_eYoV3FY Thread
Riot pls :D
Drakylon3 votesI find it strange that Scatter the Weak has this issue but no reports of Lee Sin's ultimate having this issue have surface for however many years he's been out.
daemanic1 voteswow thats nuts
DorkunedAuras1 votesRammus shell too spikey
FastAsHeck1 votesRammus has too much swag, Jax couldn't take it
Jugganott741 votesMight have something to do with W mixing with 
E
Evewynn1 votesSyndra E is still so buggy.
I once tried to last hit blue buff with it, and it just disappeared. Neither my jungler nor I got the buff. The enemy jungler wasn't around. It was just gone.
Arsenic Sulfur1 votesReminds me of when the 6.9 skins were on the PBE. During the first week or so, picking one of the skins in bots would make it so that every time the wearer got a kill, it would show the last killed champion's icon on the banner and it would not show up on the side of the screen. Oh and any assists were also not shown.
The Deckowner1 voteskilling one's own teammate is amazingly efficient cuz you get the killing gold and u earn the bounty!